Apexin

I own a 2004 GT 6spd. This will be my first auto-x season with the car. Its all stock. There are 52 pages of should I or shouldn't I premix. I'm not looking for an opinion, I'm just wondering if you guys do or don't. The car is only going to be used for auto-x, not a daily driver.

dannobre

iTrader: (3)

Yes...no question...

This is perfect place to pre-mix...

mwood

I'm not sure if premix is legal for stock class (?)

Anyhow, I never premixed and don't know of any National level car/driver that has, either. Seems like an uneeded expense and inconvenience for autocross.

chiketkd

iTrader: (5)

+1

PBlue

iTrader: (1)

the results of premix aren't exactly proven either. Its kind of a maybe it will, maybe it wont.

dannobre

iTrader: (3)

Maybe it will protect your engine.....for sure it will...especially when beating on it. The stock OMP profiles suck on low load/RPM ares of the map

Maybe it will give you more power...not as likely..but the first one is what I would base my personal decision on

Apexin

Thanks for all your help. I'm not looking for more power or an edge, just want to protect my engine. I am a 1st time rotary owner and i want it to last. BTW it's 15 degrees here in Rochester so i wont be auto-xin until April, So keep posting auto-x pics to give me hope.

Mr. Pockets

I don't know about the others here, but when I'm on course I don't spend a whole lot of time at 'low load/RPM.'

I have noticed my '05 using way more oil on autocross weekends. I totally believe you that the car doesn't use a lot toodling around town at 3k. Does it use enough? How the hell should I know.

I'm with Chike - I haven't used premix in my car at all.

chiketkd

iTrader: (5)

My car also uses a bunch of oil when autocrossing which is a good thing.

With the whole premix debate, I looked in my owners manual and it says to run premium gas only in the car. It mentions no 'premix'. If my engine ever goes bad, I can say that I followed the owner's manual to the letter.

dannobre

iTrader: (3)

It doesn't say to go and beat on it in an autocross course either

Brettus

iTrader: (2)

just recently pulled my engine apart - for a failure not related to lubrication .
I regularly beat up on the car at the track.
I have premixed for the last 50,000 kms and the engine has done 105000 kms .
The inside of the housings were in excellent condition and there was very little buildup of carbon anywhere . Apex seals showed no sign of wear.

I will carry on premixing .....

ULLLOSE

iTrader: (1)

Not legal for stock class solo.

chiketkd

iTrader: (5)

I was only referring to maintenance/care of the RX-8. I follow that to the letter.

dannobre

iTrader: (3)

If Jason says it's not legal....kinda solves the problem

invasion08

iTrader: (7)

RX-8 - Race Tips from Racing Beat

While undertaking development work on the RX-8 Renesis engine for SCCA T2/T3 use, we decided to introduce extra oil into the fuel to monitor the effect. To our surprise, this additional oil increased power! Further dyno testing found that by adding 10 oz. of Royal Purple 2-Stroke Oil to 6 gallons of fuel, we gained an average of 1.7 HP from 2000-9000 RPM, along with an increase in peak power of 4 HP. We validated this increase by changing back to a “non-oiled” fuel - and the power returned to the previous level. Later, we tried the same test with another brand of synthetic oil with nearly the same results.

For racing applications, the addition of a high quality synthetic oil increases power and most certainly decreases wear. The only negatives are the cost of the oil and an increase in the tendency to foul the spark plugs. (Note: We have not performed these tests on non-RX-8 engines yet, these results are unknown.)

PBlue

iTrader: (1)

Yea but how do you know that they weren't worn because of the premix. If anything the fact that they weren't worn after 50k of NON premix shows that it doesn't matter. Theres a lack of any real proof on this topic. Logically putting oil in would reduce friction, but whether it is a sizeable amount remains to be PROVEN via valid testing. More than just "use this" or "we use it and it will make your engine last longer and your ***** bigger"... Come on...

Brettus

iTrader: (2)

/\ - hmmm , you sound like me ..... two years ago .

PBlue

iTrader: (1)

i got a case of pettit's protek R premix last year and felt or saw no difference. upon inspection of their claims, it wasnt enough for me to buy more. Im an engineer so im used to needing to back up any claims i make. they just say... look we took apart a 100,000 mile engine and it was less worn. there are too many factors for that to positively prove it to me.

Flashwing

Would it matter that pre-mix isn't a performance modification? It's like saying synthetic oil would take you out of stock cause it's not OEM oil.

I'm just curious if you're being facetious or being truthful.

learycd

iTrader: (1)

use some upper cylinder lube, its cheap and it works for a little protection

IMO having a more than normal amount of premix in the tank is assuring when im autoxing. the engine takes alot of abuse so anything i can do to help protect it. the extra oil will undoubtably protect against wear in this high stress driving, hands down

however, if your gonna run SCCA its not legal for stock class, just something to keep in mind

Razz1

Upper cylinder lube contains solvents that are bad for the seals.

learycd

iTrader: (1)

no **** huh? guess i didnt read enough of the premix thread, cause what i read had ppl using it alot. i suppose that could make sense now that i think about it based on the product. good thing i mix lightly

whats your recommendation?

Imp

Wasn't the RX8's 13B design changed so it would 'burn' the oil and gas more efficently in the chamber with the multi-side port injection?

--kC

ULLLOSE

iTrader: (1)

There are no allowances for any fuel additives in stock class.

3.6 FUEL
A. Stock and Street Touring Class vehicles will use service station
pump fuel only. Pump fuel is defined as that which is “Federally
approved for use on public highways.” This includes the pump
fuel known as “E85, but does not allow racing-type fuels which
are available at service station pumps.

As for part two of your question (notice no allowance for pre-mix here either):

13.10 Engine
M. Any oil or grease, including synthetic, is permitted.

So were you serious, or just another clown that wants to put his two cents in without reading the rules?

Even in SP, where you can have some fuel additives, you would still need to the maintain the stock oil-injection:
Appendix F:

ROTARY ENGINE LUBRICATION SYSTEM
Any rotary engine model vehicle that has a lubrication system that
incorporates an oil line injecting oil into the fuel system in the stock
configuration must maintain that arrangement in Street Prepared,
even if an alternate carburetor is used.

learycd

iTrader: (1)

def not the guy to call out on the rules....

look above his avatar