Do all RX-8 get oil in their Air Box?
 

My air box was loaded with oil from the breather tube, it even has a large spot of oil on the Air filter. Do all RX's do this?

mine didn't have any oil on the filter after 28,000 miles.

in fact, the filter was kinda dry - green air filter which is drop in replacement for stock.

Nope, but I did get peanut butter on my chocolate.

If you overfill the motor with oil, then yes you will get some oil in the airbox and MAF.

The '06s have a revised design that prevents oil from getting into the filter.

Nope never.

Heaard it's caused by over filling, but really hasn't been confirmed.

Would you like to over fill and let us know?

My dealer found oil in my intake. They said it was caused by backpressure due to a clogged catilytic converter. I didn't get as far as the air filter.

I actually have been curious about this ever since I replaced my air filter with a K&N drop in filter and found a big brown spot on the oem filter and oil residue at the bottom of the box. I saw that people were blaming over-filling the car with oil and so I tested the theory out.
My dealer always overfills the oil whenI get it changed for free and I drain the excess when I get home (yes, I am a penny pincher). I checked before I went to the dealer and found no oil in the box or on the filter. After the oil change I checked the oil level and it was, as always, overfilled. The oil reached the top of the flat part of the dips stick. I drove the car for 150 miles (beeped quite a few times) and checked the air filter and box and nothing was there and then I drained the excess oil. Therefore.... I have no idea why this happens.
Hope that helps! :dunno:

WTF dude. Personal issues maybe? :nono:

NoTears316 was referencing a old TV commercial. Apparently, you haven't seen.

46,000 miles and never a drop..

Mazda told the techs to overfill the oil on the 8's, must be for a reason. I was thinking about taking that oil tube off and putting a open filter on it, as disscused in other threads. What tube into the intake does this?, the one comming off the oil filler neck?

I've never over filled the oil and only have 3.5K on the car. I have read the thread about the catch cans but wanted to see if this was a issue with all users first. From the replies it appears abnormal to be getting oil in the air box and filter. Off to the dealer.

they'll hopefully get the kit to update you with the 2006 pcv style set up.

30k miles and never any oil in the filter.

35k miles, 2004 build date of 10/03. Never a drop of oil in the intake.

The box is dry as a bone and always has been.

No they do not. My air filter is bone dry

Really?

should I ask the dealer to not overfill the oil? They did that last time I had an oil change...
I wonder why they do it...

Yea, tends to kill the joke. Oh well.

:rollingla

and just so my replies to this thread will be semi-usefull...no, i've never found any oil in there. Bone dry. As mentioned, i've heard that overfill causes that.

Well I just got the car back from the dealer and this is a new one on me. The mechanic said that there was oil in the air box because I was filling it with oil to fast. Based on the position of the breather tube on the oil neck I could maybe see a little oil going into the tube but not the amount that was there. Add on to that I average a quart of oil every 750 miles with the last quart gone at around 550 and I start to wounder even more.

We filled it up and agreed to both monitor the next quart burned. Reasonable but a pain considering I have kept accurate records of oil consumption so far.

What do you think about this oil fill to fast statement?

raptor, i have oil on my filter as well.

Have you taken it to the dealer for this issue? I would be interested to hear what they tell you seeing that we drive the same roads.

PS Don't know if you recall but I believe we meet at the RX-8 get together at Dave and Busters late winter/early spring of this year.

LOL, i DO recall!! That was the meet when a LOT of new people showed up and I never got all of your names straight! You going to the BBQ on Sat?

Anyway, I am waiting for the dealership to get my radio face plate in and then I'm going in for new rotors/pads and the e-brake replacement. I will ask them about the oil as well as the annoying rattle coming from the drivers side near the airbox when the clutch is out (noise disappears when clutch is in).

I'm going to have to start keeping a list of all the quirks I want to ask them about!

The oil thing could be a big issue because I've read other who have had their intake system carbon lock after warranty and had to paid $2000 bill to clean it out. Many believe this was caused by the oil in the intake manifold. So please let me know what they say.

As for the BBQ I unfurtunately can't make it, I have a Cub Scout camp out with my son this weekend. I really wish I could. You're acturally someone I need to talk to. I'm probably going to sell my MS Exhaust and buy a Race Beat system. Before I do I wanted to hear how loud it was under throttle and I know your car has one. So you are high on my list of RX people to meet and talk to.

:confused: I'd be more concerned about the high oil consumption than oil in the air box.

Raptor, highly rec the RB exhaust. I was informed that flames came out at one of the last meets! w00t!

And HI val!!! How's things at Road Atlanta? You guys really were some of the nicest people I'd ever met!

Yea, I have never had to add that much oil ... but I will let you know what I find out.

I am. The dealer is now tracking it with me. There might be a connection between the oil in the air box and oil consumption. I heard another who had this problem and the dealer concluded it was a clogged CAT causing back pressure. I will post as I learn more.

Thanks for your help RedSheDevil, I'll still be looking for you at an up coming meet. I really want to hear the difference in sound levels between our two systems.

Sounds like your oil is escaping somehow and that is why you have oil in the wrong place and are going through so much. I have around 4200 miles on my car now and I have added 1-1/2 quarts total so far. Plus, I have had one oil change at 1900 miles when I was trying to get my key programmed and my plates put on. Seems like I have had to add more oil after my oil change than I did before it. I had only needed to add half a quart before the oil change and I've added a whole quart since then.

I don't know if there is any correlation but I had checked my oil a day or two before we had our 100-plus temperatures and it was still fine. I checked it a week later (after four days of driving in high 90s to low 100s) and it was down a lot (check my oil every week). I had to add 3/4 of a quart to bring it back up. The weather has been relatively normal again (low to mid 80s) and my oil level hasn't gone down on the dipstick.

I'm due for another oil change at 4900, according to my little sticker from the dealer, so in about two weeks I will get another one. I haven't noticed any oil where it shouldn't be. I wasn't looking super close but I didn't see any.

Interesting. I've logged every drop of oil I've added to mine and never noticed a change from summer to winter (going on 1 1/2 years now). Seemed to be more tied to the type of driving I was doing....

Wonder if the new flash MOP maps alter according to ambient temps? That'd be a cute twist...

Oh, and no oil in my a/f or box. 16xxx miles.

I thought it was kind of interesting that worked out that way, unless the engine had to work harder because of the temperatures, thereby using more? :dunno: I'm still getting my 23s for mileage, even with crap traffic on the way to work where it just sits and doesn't move very much or very fast when it does.

We are due for those high temperatures again this weekend so I am going to check and top my oil before I leave for work in about 20 minutes (usually do this on Fridays) and then check it again after the weather cools off again next week to see if there is a dramatic change.

My driving is basically the same, to and from work mainly. Same time of day, same route, everything. Traffic is usually always the same, too.

Bunny, you won't see the oil unless you take your airbox apart (which is not easy for small armed people!) to check the filter.

[QUOTE=Raptor75]The oil thing could be a big issue because I've read other who have had their intake system carbon lock after warranty and had to paid $2000 bill to clean it out. Many believe this was caused by the oil in the intake manifold. So please let me know what they say.QUOTE]


Wait...thats really confusing to me. Carbon and oil are not the same thing...at all. Oil in the intake system would simply cause excess oil to enter the combustion chamber, lube up everything a bit extra, and maybe cause a funky smell from the exhaust..well, and extra oil comsumption.


But..intake system carbon locking? That sounds...incredibly fake. $2000 to clean out a little bit of dry carbon and oil?! Ahh! Couple of nuts and bolts..bit of Brake+Choke cleaner...$1995 saved..

Perhaps but the people who reported it had to have their intake system disassembled and cleaned at 50K to 60K miles because the various ducting valves were not opening probably through the RMP range. As oil burns/bakes it will leave carbon build up and the rotary runs very hot. I don't think it is a big stretch to see this problem develop. Search for the thread on this.

yupppp
 

Theres a small black plastic box behind the maf on my 2005. That thing seems to pick up a lot of oil from the tube across from it. Ive found when accelerating hard up hill the excess oil in it will dump back into the engine and cause a cel after coughing up blue smoke and nearly choking the eng. Resolution for me was to rotate the box so it wouldnt accumulate oil. Also seems to run better overall during hard use. Makes sense since theres no more large puddles dumping into the intake. After i did that... No more oil on my filter.
Ps. Empty the box before you turn it i skipped that part and spent all day spraying out my cold air intake and replacing an expensive air filter.

Holy thread bump batman! If you have more problems look into a catch can.

When i was working at mazda seen one come in with oil in the intake, but this was a situation caused by the owner redlining the motor and the front apex seal was partially blown causing oil blow by to come back up the intake, (at least thats what tech support told us, they said they had a few cases of that happening) we tested the compression front casing was like 5.0 and the rear casing read 7.2 so it could be possible,the kid admitted to my co-worker thats what he was doing but didn't tell the writer that so his motor would still get covered under warranty not saying thats what wrong with yours, but as everyone else has said over filling will do that too.

not to alarm you but keep this in mind - I have had my engine replaced twice.
the first engine lasted 140,000 klm and it began showing alot of oil in the air-intake and soaking the air filter, the same as you have mentioned. Compression was bad in the front rotor.
the 2nd engine was a complete dud from the start, it only lasted maybe 3,000 klm before a compression test showed 1/2 compression in the front rotor. Oil in the air-intake was present from the beginning. oil in the bottom of the accordian tube and soaking the air filter as well.

I have now put about 35,000 klm on my 3rd engine (which is running great) and not a single drop of oil has ever been present in the air intake.

again.......just my 2 cents but something to keep in mind.

turning that box around wont fix your problem bro

and if you think a air filter is expensive, your gonna be shocked when its time to replace your ignition system

When I first got my Rx8 there was oil in the air filter. I changed the air filter out and since have done my own oil changes and monitored the oil level. It has been a year and yesterday I pulled out the air filter and it is very clean. Only a slight lubricated feeling over the entire K & N air filter that was there when I bought it. I believe we could confirm that overfilling WILL cause backspray into the air filter.

It's not overfilling.

It just ain't.

Take the tubing off the filler next time you add oil - I don't care HOW fast or how large a jug you use, oil will not come out that nozzle.

Put your finger in and feel the inside - it's not just a 'hole,' it is a carefully made slot to avoid any oil going out as you fill.

I've personally overfilled when I mistook a 5 litre jug for a US gallon, and had to drain some, but none ever came out that vent.....

The oil is carried up and out by blowby gasses, which can be a large flow, and gets larger as the engine ages. A catch-can will knock most of it out.

No oil ever went into your airbox via overfilling.....

Recently I made a mistake by thinking my transmission fluid pan/plug was my oil pan when I went to change my oil for the first time. This became pretty obvious when I could only fit in about 3 qts. I took care of that issue though, with the help of some of the members here I refilled my transmission fluid and got everything sorted with the oil.

My point is, there was definitely oil on my air filter + box + hosing. I cleaned everything, replaced the air filter, and cleaned the MAF, and it has been bone dry since. So if you pull a dumb move such as I did it is possible for oil to be there :cwm27:

I had this issue before, during spirited driving/autocrossing my catch can would fill up insanely fast. Lol during my 4th dyno pull, my catch can filled up and oil exploded into my intake causing blue smoke and a engine hesitation + CEL. after installing a PCV system, haven't seen a drop of oil in the intake tract. the pcv system was implemented on 06+ rx8s, you can order the kit through the local dealer for an 04-05. oh I forgot to mention I have the RE oil pressure kit, which increases pressure and blow by, stock form may not see as much blow by.