ok these are really 2 quick questions and i don't know the answers they are fairly simple and not that pressing but the one about oil is, you guys told me to by 5w20 and I accidentally bought 5W-30, is that going to be a problem if i put it into the car??? I was told it wouldn't do anything tooooo bad, but i just want to double check.

The other is, a lot of you guys talked about Premix, now i don't know what it is, but i bought this orange stuff called 104+ octane boost, and the guy at advanced auto parts said thats the only stuff that came close to what i was describing so i bought it and want to make sure this is the stuff you guys are talking about.

Nothing too bad going with 5w-30, especially if you're in a warmer climate.

Octane boost has nothing to do with [oil] pre-mix. Pre-mix provides enhanced lubrication to the rotor seals for better track performance.

Higher octane [gasoline] prevents pre-ignition (aka dieseling , knock, ping). You only need just high enough octane for smooth operation - any higher is a waste of money.

If you live in the New York area (I presume you're from there) the 5W - 30W will be fine....+1 on the pre-mix...

If you decide to pre-mix oil in your gas, and if your car is stock, you should use a two-stroke oil rated for dirtbikes or snowmobiles - the marine stuff (TCW-3) has metallic additives that could damage your catalytic convertor over time.


S

If you decide to pre-mix oil in your gas, and if your car is stock, you should use a two-stroke oil rated for dirtbikes or snowmobiles - the marine stuff (TCW-3) has metallic additives that could damage your catalytic convertor over time.


S

I've seen dirt bike oil kill cats too.

5w30 is what the RX-8 should be running. The only reason Mazda recommends 5w20 is to improve fuel efficiency.

Premix = 2stroke oil in your gas tank. I would only use Idemitsu fuel lube or Amsoil Saber Pro.

100:1 as maximum, 150:1 as normal and 200:1 as minimum.

12oz, 8oz and 6oz to achieve the ratios above per full tank of gas. That’s roughly 1$ per tank @ 8oz.

You should also think about getting a Sohn OMP adapter so that you can use a synthetic oil and feed your rotors fresh 2stroke oil that is meant to be burned.

I've seen dirt bike oil kill cats too.

Cat's are easy to replace.

I worry more about clogging the fuel filter!!!

The only reason Mazda recommends 5w20 is to improve fuel efficiency. Love how you make that sound like a "bad thing". Better fuel efficiency—oh my god, no!!!

:rolleyes:

Love how you make that sound like a "bad thing". Better fuel efficiency—oh my god, no!!!

:rolleyes:

So you care more about fuel economy than you do about the best protection for your engine?

It sounds to me like you bought the wrong car. :icon_no2:

5w30 is what the RX-8 should be running. The only reason Mazda recommends 5w20 is to improve fuel efficiency.

Premix = 2stroke oil in your gas tank. I would only use Idemitsu fuel lube or Amsoil Saber Pro.

100:1 as maximum, 150:1 as normal and 200:1 as minimum.

12oz, 8oz and 6oz to achieve the ratios above per full tank of gas. That’s roughly 1$ per tank @ 8oz.

You should also think about getting a Sohn OMP adapter so that you can use a synthetic oil and feed your rotors fresh 2stroke oil that is meant to be burned.

these ratios mentioned are only if you disconnected the existing OMP. if you run with the OMP at 100:1 for the premix in the fuel tank, you will have too much oil

It is irresponsible to make a blanket statement that 5W30 is "better" than 5W20.

I doubt anyone on this forum could give a definitive answer to that, even if they had the data.

To make a 5W20 oil, and have it meet the specs and stay 'in grade' over the whole oil change interval, is virtually impossible for a mineral oil - some or all of the basestock must be synthetic. These are new technology - ten years ago oils of this capability just did not exist.

A thinner oil will circulate faster, reach bearings sooner, have lower back pressure and filter d.p., cause less friction, less fuel use - and crucially - cool better.

Rotaries do not usually die from bearing failure - heat is the enemy, and a 5W20 will just do the job better.

S

these ratios mentioned are only if you disconnected the existing OMP. if you run with the OMP at 100:1 for the premix in the fuel tank, you will have too much oil

too much of what oil ? premix ?

Im mixing about 120:1 right now. Engine has never been happier. I can feel it ... she talks to me every day :)

You can say anything over 100:1 is just a waste of money. but theres no such thing as *too much oil*.

It is irresponsible to make a blanket statement that 5W30 is "better" than 5W20.

I doubt anyone on this forum could give a definitive answer to that, even if they had the data.

To make a 5W20 oil, and have it meet the specs and stay 'in grade' over the whole oil change interval, is virtually impossible for a mineral oil - some or all of the basestock must be synthetic. These are new technology - ten years ago oils of this capability just did not exist.

A thinner oil will circulate faster, reach bearings sooner, have lower back pressure and filter d.p., cause less friction, less fuel use - and crucially - cool better.

Rotaries do not usually die from bearing failure - heat is the enemy, and a 5W20 will just do the job better.

S

but 5w20 does not lube parts as good as 5w30. In United states (or the NA market) we're having an unusual high*er* failure rate than the rest of the world. and we're the only part of the Whole Rx8 who recommends 5w20.

Just like GM's Dex-cool, it *suppose* to cool better and last longer, well, at least on paper. But the reality is, it suck at cooling, and it just wont last. and finally people sue GM.

It sounds like we're going thru the same path.

There are people who can live with 5w20, but people who use 5w30 from day 1 (well, starting from their 1st oil change), seems to have less problem. Thats what I've seen for the past 2+ years on this forum.

ok these are really 2 quick questions and i don't know the answers they are fairly simple and not that pressing but the one about oil is, you guys told me to by 5w20 and I accidentally bought 5W-30, is that going to be a problem if i put it into the car??? I was told it wouldn't do anything tooooo bad, but i just want to double check.

The other is, a lot of you guys talked about Premix, now i don't know what it is, but i bought this orange stuff called 104+ octane boost, and the guy at advanced auto parts said thats the only stuff that came close to what i was describing so i bought it and want to make sure this is the stuff you guys are talking about.

5w30 or 5w20 would be fine. but I like 5w30 more, if NYC isnt that *cold* I will use 5w40.

The Octane Boost 104+ thing is just a waste of money. if you can return it for a full refund please do so. Most people dont know wtf is premixing so asking the folks working @ Advanced Auto parts usually wont help. You can just go ahead and walk to their motorbike section (probably somewhere in the corner), and start looking at bottles with *2-Stroke oil*. There are a lot of them out there, all major brand has a 2-stroke oil.

So you care more about fuel economy than you do about the best protection for your engine?

It sounds to me like you bought the wrong car. :icon_no2: Why do you assume one must choose between fuel economy and engine protection? Have you considered the possibility that, in fact, you can have both?

A popular rx8club.com "fact" is that use of 5W-20 led to engine problems. The peculiar logic goes like this:

1. Mazda specifies 5W-30 for all RX-8s around the world, except in North America.
2. Mazda specifies 5W-20 only in North America, because Ford/Mazda wanted to "up" EPA ratings as much as possible.
3. Only NA Renesis engines experienced compression loss.
4. Therefore, the use of 5W20 must be a factor leading to the engine problem.

Unfortunately, that's faulty logic. Circumstantial evidence that doesn't prove anything. Other variables peculiar to American RX-8 ownership (i.e. driving habits, ECU calibration, how often oil level is checked, local climate, engine modded or not, etc.) might also account for the problem.

Coming on the heels of the last RX-7 and its reliability issues, I find it hard to believe that Ford and Mazda would introduce their new rotary-powered car with a grade of engine oil that would not fully protect the engine. Don't you think Mazda and Ford engineers would fully test the Renesis on 5W-20 before using and recommending it? That's got to be standard procedure with any change to a new oil - particularly on a new model whose reliability would be under the microscope.

Yes, it's possible that use of 5W-20 was a factor. But oil technology continues to march onward, and it's also possible the 5W-20 can both a) improve fuel economy and b) fully protect the engine.

I use 5W-20 becuase I figure the automotive engineers who designed the engine/vehicle know what they're doing and have a sound reason for recommending it.

But again in response to the original question, 5W-30 won't hurt anything.

too much of what oil ? premix ?

Im mixing about 120:1 right now. Engine has never been happier. I can feel it ... she talks to me every day :)

You can say anything over 100:1 is just a waste of money. but theres no such thing as *too much oil*.

120:1? thats about half a liter of 2 stroke for a tank of gas. Then with the OMP working, you also have some engine oil too. the ratio will be close to 100:1 or even 90:1 of total oil vs total fuel burnt.

120:1? thats about half a liter of 2 stroke for a tank of gas. Then with the OMP working, you also have some engine oil too. the ratio will be close to 100:1 or even 90:1 of total oil vs total fuel burnt.

more like a bit more than 1/4 of the liter.

Sometimes I go crazy on it, sometimes I just ignore it. its about 4-12 oz, usually about 8. It depends on my mood and how much gas I have left in the tank.

I just got my 04 GT last week and wondering exactly what needs to be done for "PREMIX". nothing on here says exactly what steps that needs to be done to do this for the first time.
How do I decide what oil to use in the car in general?

I was told no synthetic and to use 10W30 due to St. louis's heat is that right?

what is the OMP? and how do I disconnect so I dont have to much oil as one post said?

what is the exact measurement anyone here recomends?
any other helpfull hints would help me out alot.

Thanks

Yes, 10w30 will hold up a bit better in hotter climates than 5w20.

Nothing special to do, or to disconnect, for pre-mix. 4 oz of pre-mix (2 cycle oil) per tank of gas for general use. Easiest to add prior to fill up for best mixing. Idemitsu preferred by many.

http://www.idemitsu-usa.com/page_210.htm

I just got my 04 GT last week and wondering exactly what needs to be done for "PREMIX". nothing on here says exactly what steps that needs to be done to do this for the first time.
How do I decide what oil to use in the car in general?

I was told no synthetic and to use 10W30 due to St. louis's heat is that right?

what is the OMP? and how do I disconnect so I dont have to much oil as one post said?

what is the exact measurement anyone here recomends?
any other helpfull hints would help me out alot.

Thanks

So for a new RX-8 owner in St. Louis...using 10w30 and adding the 2 cycle oil are two good recommendations? Any other tips?

Thanks in advance!...

here is a premix question I've been meaning to ask:

do you dump the premix directly into the tank or are you using a clean gasoline container first?

here is a premix question I've been meaning to ask:

do you dump the premix directly into the tank or are you using a clean gasoline container first?

I use a 4 oz bottle that I got from the container store for like 2 bux.

Pour the premix into the bottle, dump the whole thing in to the tank, fill her up, close the cap, drive away knowing that its lubing the seals.

I use a 4 oz bottle that I got from the container store for like 2 bux.

Pour the premix into the bottle, dump the whole thing in to the tank, fill her up, close the cap, drive away knowing that its lubing the seals.

thanks, no one ever mentions that in all of the hundreds discussions on this subject!

thanks, no one ever mentions that in all of the hundreds discussions on this subject!

nope.

if you read you will find 5 oz dixie cup..


beers :beer:

What is the advantage of premixing anyway??

For daily driver there really isn't any, given that current PCM flashes already meter add'l oil to ensure optimal rotor seal (which is what pre-mix augments). Remember that a rotor doesn't have the sealing rings of a conventional piston and therefore precise tolerances, augmented by a thin layer of oil, seals a rotor.

However, for we who pamper our machines, it does give peace of mind, especially with spirited driving. For track use it's a very good idea to pre-mix.
For everyday/spirited driving 4 oz. per tank of gas is plenty.

What is the advantage of premixing anyway??

http://www.rx8club.com/showthread.php?t=138114

put in 4 oz per tank if u want ur engine to last.

interesting to know that 09's are getting 1 additional oil injector.

What is the advantage of premixing anyway??

*sigh*

better sealing ? better lube ?

Search anyone ?

For daily driver there really isn't any, given that current PCM flashes already meter add'l oil to ensure optimal rotor seal (which is what pre-mix augments). Remember that a rotor doesn't have the sealing rings of a conventional piston and therefore precise tolerances, augmented by a thin layer of oil, seals a rotor.

However, for we who pamper our machines, it does give peace of mind, especially with spirited driving. For track use it's a very good idea to pre-mix.
For everyday/spirited driving 4 oz. per tank of gas is plenty.

The think the problem is more like the oil cant even get to the center of the apex seal. premature wear can occur.

One of the reason why Mazda add another oil injector to the coming 09 motor right at the middle.

I mean our engine will work but, not going to last too long if it does not premix.

is this ever going to end? lol

5w20 most of the time .... 5w30 in the heat of summer when temps are in the 90s. my economy does suffer with 30 but at least I know the engine wont suffer.

can anyone agree on that?

ps ... i always use that lucas crap ... i believe it does help.

Ive been premixing for the last 2 tanks with lucas non synthetic two stroke. I got it from O'reiley's and I went from bairly getting a hundred miles to a half tank to 104 miles today. Keep in mind as I have found that if you try to baby this car to much to save gas you wont. I normally shift between 3 and four grand and thats ok Ive found but from what I have read on the site its good to rev it up to 7 grand every now and again. Ill baby it and every so often ill drive it like I stole it.

Has anyone that premixs had oil on your air filter. I havnt gotten an intake and went to take out the air fliter and it had oil spewed on it from the throttle body. It was if every time the throttle body opened to breath it was spewing oil onto the filter. Is this normal if you premix?

Has anyone that premixs had oil on your air filter. I havnt gotten an intake and went to take out the air fliter and it had oil spewed on it from the throttle body. It was if every time the throttle body opened to breath it was spewing oil onto the filter. Is this normal if you premix?

Dude, someone overfilled ur motor oil.

Oil in Filter = Motor oil overfilled by morons, that could be you if u did ur own oil change.

What does that have to do with Premix ?

Get ur facts straight before u try to blame something.

Seriously people, Please read and search b4 u post ur question.

Has anyone that premixs had oil on your air filter. I havnt gotten an intake and went to take out the air fliter and it had oil spewed on it from the throttle body. It was if every time the throttle body opened to breath it was spewing oil onto the filter. Is this normal if you premix?

no relation to premix..

over fill of oil. or improper fill of oil.. both involve poorly done oil change...


beers :beer:

Dude, someone overfilled ur motor oil.

Oil in Filter = Motor oil overfilled by morons, that could be you if u did ur own oil change.

What does that have to do with Premix ?

Get ur facts straight before u try to blame something.

Seriously people, Please read and search b4 u post ur question.


I wasnt blaming anything dude I was asking a question. Simple as that, being that I have no experiance with a rotary engin. No need for you to be a dick about it. I would love to read and research this kind of shit, why dont you be a huge help and tell me a few places to read. Or you can not be a dousch and read and see that I was doing research and asking a question.

Dude, someone overfilled ur motor oil.

Oil in Filter = Motor oil overfilled by morons

You could have stopped there and not have been a dick.

In fairness though, 9K RDLN...read the stickies at the top of each area.

I wasnt blaming anything dude I was asking a question. Simple as that, being that I have no experiance with a rotary engin. No need for you to be a dick about it. I would love to read and research this kind of shit, why dont you be a huge help and tell me a few places to read. Or you can not be a dousch and read and see that I was doing research and asking a question.

You could have stopped there and not have been a dick.

In fairness though, 9K RDLN...read the stickies at the top of each area.

in case BOTH of u never notice, I DID answered 9K's question.

U guys are pissed cuz u knew I was right about 9K never searched.

it has nothing to do with Rotary or whatever, its you, 9K, and ur 3.8 GPA does not impress me, my cousin has 4.0 and she is a doctor, my GF has 3.85 with CPA, I never finished college but Im making more than they do. so what are you trying to impress me with ? ur lack of knowledge ?

To learn, u gotta work on it, not just *post & wait*

Those who hate know it all cuz they know nothing at all.

Im not know it all, but obviously u're part of the "know nothing at all"

Its alright man, we know that u know nothing :lol:

Oil in filter has something to do with premix ... priceless. :lol:

not to mention, u came up here to just reply to this ? Wow, U have a life there, MR. 3.8 GPA

Pissing contest!!! :piss:

Back on topic and to the OP, use caution when choosing a pre-mix oil. There has been some talk here that some of the more commercially available 2-stroke oils are more rapidly clogging fuel filters. Lots of the oils you find at Wal-mart and the like have dark blue dyes included, which apparently turn to black sludge in your fuel filter. I use Idemitsu that I ordered from MazdaTrix...4 quarts cost me roughly $30 shipped, and it contains no dyes. I've been using it for over a month and am still on my first bottle, adding 6oz. per tank.

Prior to pre-mix, I was getting a nasty rattling on acceleration, sounded to me like detonation, but could have been intake ports rattling. With pre-mix, I've seen a very modest increase in MPG (+1mpg) and the rattling is almost completely gone. I can only hear it now if I fail to give enough gas when releasing the clutch on launch. The engine seems to spool up more smoothly than before and sounds less coarse as well. Another thing I've noticed is that the classic rotary "whup-whup-whup" exhaust sound at idle (typically heard on 3 rotor engines) is quite noticeable since I've been pre-mixing. I may be imagining it, and if I'm not, I've no idea what the hell that means, but the car seems like it. :)

wow,

you know so much.. and big words..

and the knowledge you have given.. i predict a big cup of bye bye for you..

this is aimed at r9 rdln.. it is a copy of what he posted. before i got to quote it..


beers :beer:

Dude, someone overfilled ur motor oil.

Oil in Filter = Motor oil overfilled by morons, that could be you if u did ur own oil change.

What does that have to do with Premix ?

Get ur facts straight before u try to blame something.

Seriously people, Please read and search b4 u post ur question.

How much oil would you need to put to get something like that to happen?

How much oil would you need to put to get something like that to happen?

about 1/4 quart more than what the capacity is will trigger this event.

its nothing scary really, if u catch it early and clean the stuff out b4 it gums up that is.

Question, I ordered Idemitsu premix from Mazda Trix, however i see that it says it is synthetic. I do not have the Sohn Omp and would like to know if it is okay to put synthetic premix in my car. I thought synthetic was a big no-no for rotaries.

uh.. there we go again.

synthetic is fine.

read your own sig.

i've been premixing Idemitsu and using synthetic Royal Purple motor oil for the last 10,000 miles - absolutely no issues.

lol, yea my sig...Just thought I'd ask to clear up some uncertainties that i had. Thanks for the input, I figured since I use regular motor oil i might as well not add synthetic premix would kind of defeat the purpose.

you must remember that premix may b synthetic but the point of it is to burn....supposedly the reason y synthetic is not recommended(at least what i got from it) is that it does not burn as good as regular unless it's an oil that is meant to burn like premix!!!

Search, Search, Search

yeah. SOME synthetics don't burn as well, so make sure whatever you use is tried and true.

What synthetics dont burn well?

Even on this website, even those who use premix, even those who use synthetics still beleive in the myths that are spread around...

unbeleivable

I don't know, I seem to recall people saying Mobil 1 didn't burn well. I'm not certain though. I feel like I got that from rotarygod, but cant say for sure. Either way, I'm using Royal Purple, and thats just fine. I also premix Idemitsu with FP+

My car is completly stock and i premix with Marvel Mystery Oil (MMO) is this stuff going to kill my cat?

This will never end.

you must remember that premix may b synthetic but the point of it is to burn....supposedly the reason y synthetic is not recommended(at least what i got from it) is that it does not burn as good as regular unless it's an oil that is meant to burn like premix!!!

Search, Search, Search

Synthetic = bad for rotary because ...

Mazda fucked themselves up by using cheap seals 30 something years ago. Synthetic oil ate those seals alive, it cost Mazda "tons of money" to replace the part because it was Mazda's fault to use the cheapest crap that they can find at that time.

So there u go, a Myth has been going and going and still exist today.

Carbon came from Synthetic? Sorrrrrry but Im 99.9999% sure that I can just go out and pull any engine that use nothing but Dino right now and still see the same carbon inside. its mostly crap from gas, not engine oil.

Synthetic = bad for rotary because ...

Mazda fucked themselves up by using cheap seals 30 something years ago. Synthetic oil ate those seals alive, it cost Mazda "tons of money" to replace the part because it was Mazda's fault.

You are scaring people just saying that.

And I don't know how many times you will type that before you are tired....

I think I've seen you say that like 20 times already... the information is there.. people must learn themselves!

You are scaring people just saying that.

And I don't know how many times you will type that before you are tired....

I think I've seen you say that like 20 times already... the information is there.. people must learn themselves!

I also know that for some reason, I dont know, some ppl are probably blind or something. they just "can't" see the info that they "don't" want to see.

So Im just gonna keep repeating it until ... the end of days ? :lol2:

thanks guys, im going to go ahead and begin the premixing!! Is there anything better than Idemitsu for premix?

dunno, I think Idemitsu and Marvel Mystery Oil are the most popular. MMO has some cleaning properties too, where Idemitsu is only a lube. So I throw in a little FP+ with Idemitsu, but MMO takes care of that all on its own.

What is FP+?

What is FP+?

http://lcdinc.com/products_fuel_power.php

Protek

http://pettitracing.com/rx8/index_faq_protek.htm

I'm not using Castrol Marine if anyone cares!!!!

Is FP really that important?

I'm not using Castrol Marine if anyone cares!!!!


I care.

It proves that at least ONE person listens......

S

Is FP really that important?

Probly not critically important, but it is supposed to act as a fuel stabilizer too, and claims to yield a minor bonus to MPG (dunno if anyone actually saw a mileage improvement though). If you do the periodic Mazda Zoom-Power Engine cleaning that we're supposed to do every once in a while, I don't think detergents are mandatory.

yes I listen!!!!!haha! what is it about castrol that nobody likes

I ordered Idemitsu, till that comes...am I okay with Valvoline TC-W3 for premixing??