Car needs more track time LOL no crap on plugs then :)

I agree!

I like your barcode... LOL.

Carbon build up is from fuel and fuel only. It is not from the oil injected into the combustion chamber. Don't believe me go run an alcohol motor and see how much carbon you will have on the rotors. Your answer will be zero.

I think you may be onto something here ... What's US ethanol content in our gasoline vs. Other countries where there are less failures?

The Renesis design (of unburned fuel "recycle" and hot internal engine temps could contribute to premature wear? Although this is accurate not for side seals ... still a thought tho

I believe we are at 10% since the ban of MTBE.

most carbon build up is from the gas you burn. Plus driving habits.
Lets not get into the ethenol thing.
9K you had that much oil on the sparkplug threads?
My 10K mile engine that is down but not apart--still has shiny parts on the rotor faces that can be seen through the sparkplug holes.
You know guys--other than what we are doing already--- i dont think there is a whole lot we can do about the life expectacy of the S1 engine?
OD

Yeah that much oil was on the threads, not sure if it was 2 stroke or engine oil though. When I changed these plugs I am pretty sure my OMP system was functioning normally as far as I can remember but I was premixing heavily.

Dan, I actually changed these right before a 100 miles of hard driving on a canyon run last May :) I guess I should have done the run and then pulled them :)

So is there any way we can figure out which fuel has the least junk? I'm sure they are all pretty close...

There are stickers on the pumps that indicate the maximum ethanol content.
Go to a top-tier station that pushes 10% or less ethanol and that is about the best you can do.

I mix E85 and premium, so this threads fails as much as the canyon run BS talk once again ....

And you do this why, exactly? You just want the car to run lean?

I can get ethanol free gas on base...

dont think Team can fairly compare an engine that only sees autocrossing(?), is running evans coolant, E85/premium gas ( probably race gas?), race car maintainence, custom tune, to the rest of us slobs trying to get by.
Oh --and I am curious--how can a thread that is started for discussion purposes "fail".
After all a therory is only an idea--it is not fact. Cant you discuss an idea without "failing"?
OD

More great input from TeamRX8. As always, we appreciate your wonderful input :lol:

Thats me!

I'm just gonna do whatever I think will help my engine and if I blow it well then I ll just have to rebuild it again.

It certainly is interesting input. I would love to hear his rationale.
Ethanol has a lower stoichiometric ratio than gasoline and E85 - being a blend of gasoline and ethanol - will produce tailpipe AFRs that are 3 to 5 points leaner than commanded at an equivalent injected volume.
In an NA application (on a properly calibrated PCM), this would be a net power looser and potentially damage the motor. I suppose if the car is not properly tuned, it could be used as a band-aid to lean-up the mixture.
In an FI application it would just be pure boom.

I agree that only a small part of the premix oil amount that is injected with gas in to the intake will help the lubrication.

I take one more bet on clean 4 stroke full syn (0w)by MOP's nozzles. (and maybe a little premix for the apexes, but actually not for my engine.)

Two things:

1. Are those the best pics of freakin spark plugs or what!!
2. Denny, are you suggesting that the S1 oil injector location on the top of the motor is different or aimed different than the S2's? JUST the original S1 to S2, NOT the S2 Apex seal squirters. Hope I understood you correctly. Apologies if I did not.

If you don't know my brother could someone chime in that knows this for sure? NO guessing or assuming. Fact, fact, fact. I was told the location is the exact same for a reputable source. Perhaps he was wrong????....

:lol: I wanted detailed pics.

The two squirters are in the same location.
They just added a third slightly further along the housing from the original two.

The Nozzles themselves are very different between the series, Denny I think was referring to how the Oil comes out of the side of the Nozzle in Series 2's, not directly out of the middle end like S1's.

S2's don't have vacuum connections on top of Nozzles either, internally they have a fine gauze filter, and a one way check valve.

Pic of S2 Nozzle
N3R1-14-631

https://www.rx8club.com/attachment.p...1&d=1295519704

https://www.rx8club.com/attachment.p...1&d=1295519704

Thanks for coming in Ash. that is exactly what I was referring too. I remembered those pics you posted --somewhere. It ie really interesting that the actual nozzle oil exit was redisigned.
Obviously it is to get the oil to the corner side seal in a better way. IDK exactly how it works, but I am sure Mazda did it for a specific reason. We have to remember also that the S2 oil nozzle works under pressure now--it is not only a fixed volumne delivery anymore.
Eric--S2 set up in the near future?
The S2 engine is a good improvement in design--no doubt.
OD

The sideways discharge of the nozzle is just an anti-clogging measure.

May I ask, is it common for the nozzles to clog or the lines to clog? I'm a bit worried because my 8 doesn't seem to use that much oil, even though I drive pretty aggressively.

I dont think those nozzles have an opening on the very end--only on the side. Like Ash says the oil comes out the side, not the middle.
OD