I just premixed with Castrol 10w-30 synthetic blend
 

https://cimg9.ibsrv.net/gimg/www.rx8...4ee24427e5.jpg
https://cimg7.ibsrv.net/gimg/www.rx8...60f133fd06.jpg
I filled this water bottle with one third oil and two thirds gas, shook, and it immediately became homogenous. So far no problems. Has anyone tried this?

Your fuel injectors might act funny with engine oil in fuel.

Besides, what does premixing with 4-stroke achieve? The oil injectors are already doing that. 2-stroke premix helps because it's designed to be burnt cleanly, and even then, no one has concrete evidence that it helps.

Yeah, premixing 4-stroke is generally a bad idea. Don't let the car sit for long, you want to keep it mixed in the gasoline while you burn through it, and not slowly separate until you hit a point where the fuel system only sees oil instead of gasoline. Fuel pump, fuel filter, fuel injectors... not to mention injecting straight oil if it gets that far.

I'm confident saying that 2-stroke is proven to work. The primary reason i say this is how the Grand Am RX-8s, prior to that the Grand Am RX-7s, and the entire Star Mazda / Formula Mazda series all premixed their fuel. I had a discussion with Speedsource crew about it briefly at Lime Rock in 2010(?) when I filled in on their over-the-wall crew on the #69. The other teams could all just fill up from the fuel provided at the track, but the RX-8s all had to bring in fuel with them, premixed with oil.

They couldn't run un-premixed without engine failure, and they definitely would have preferred to NOT go through all the hassle and cost of premixing and hauling fuel around for every race.

Do you know what ratio they were using with success? Right now I'm pre-mixing 0.25oz per Gallon of fuel, granted I also still run the OMP (stock calibration) with a SOHN adapter.

No, I do not know what ratio.

Did speedsource and the star mazda cars retain their omps though?

I don't recall any confirmation that they did not keep the OMP off hand (it's been several years), however I do not believe that they did, and I think the general consensus was that they didn't.

did i make it in before ops next threads "help my car is running funny" then "why wont my car start" followed by "rx8s are pos so heres my partout" lol

The few pictures I've seen of STAR engines, they didn't have OMP lines, but I've only seen two images of those engines, and they were in-car.

History is doomed to repeat itself.

https://cimg7.ibsrv.net/gimg/www.rx8...9015195a51.jpg
(Somebody had to since 9k is AWOL.)

No, not really. No one had to.

We were all thinking it. I was just the one brave enough to pick up the slack.

I run 0.5 oz per gallon(or about 4mL per litre). I don't(and can't) have SOHN, though, so take that with a grain of salt.

Conspiracy theory time: NAP is 9k all along.

I also think that 2-stroke oil helps, but there isn't a test done in a controlled environment.

Yup, nothing available at least, so still guesses, even if probably correct ones.

:suspect:

Im thanking everyone but you.
..l., You
I bought this car knowing what I was getting into. I took this car apart and troubleshot all the way from the maf to the omp nozzles. Then took out my renessis with a 2x4 and a rope, helped rebuild it then put it back in. I fixed almost every system in the car to some degree. And I didnt pay a fucking soul except for the rebuild. And I'm no mechanic. With the way i drive all that oil will be out of my tank today.
fucking troll
..l., you

I do get your humor but im not that pussy who quits and blames others

I didnt see 9k's response lol:lol:

today is friday
the tank will be done before midnight.
I used to have injector and filter problems but used gummout complete fuels system cleaner and b12. Never had those issues again. oh i got my injectors cleaned at the rebuild too.
I used the castrol because there was no 2 stoke available that was jaso fc, only tw 3c or whatever. Actually the engine oil was recommended by the engine builder. Anyhow it looks like I will have to special order premix by the gallon. jaso fc is hard to find on a shelf around here

Yup, usually is.

You could just buy a case of Idemitsu then, or order something else of your choice in bulk.

I buy a case of 12 quarts and it lasts me a year. This is with me daily driving my car.

http://a.co/d/dVl0hsT

http://a.co/d/8UsPsXW

Both: API TC, JASO FC & FD, API EGD

JASO FC = ISO EGC
JASO FD = ISO EGD

https://www.motor-talk.de/forum/akti...hmentId=683876

Same here. I buy a case from Mazdatrix once a year.

Ravenol 2 stroke FD
https://cimg8.ibsrv.net/gimg/www.rx8...bfe96fcf0b.jpg

If your running a SOHN Adapter you 100% are not premixing heavy enough, even if you recalibrate your ecu and are running 100% duty cycle 99.9% of the time. The OMP on any rotary engine can not work correctly being fed by just gravity. It has to have oil pressure. It is technically not a pump, it is merely a valve that meters the high pressure engine oil. If you have an issue with your engine ingesting your choice of 4 stroke engine oil, by all means use the SOHN adapter but you should be Premixing heavier. I Premix 1oz per 2 gallons (8oz per tank with the fuel light on) with the OMP connected as factory. Premixing, meticulous maintenance, 145k and I have never had a motor.

Oh, and anyone who is premixing with conventional 4 stroke engine oil needs to stop, and go get some help.

Not true :
https://www.rx8club.com/series-i-tec...cation-268559/

Interesting read.... Perhaps I should have done a tad more digging before opening my mouth instead assuming the Renesis OMP worked the same as previous rx7 models assuming your data is correct. I stand corrected sir.

If you check the design of the rx7 pumps ...it's the same . Only difference is there are 2 pumps not 4 .

RX7 pump
Compare with pic on first page (of the linked thread) ...design is the same :

https://cimg8.ibsrv.net/gimg/www.rx8...34c13344be.jpg

Have you read this thread :
https://www.rx7club.com/3rd-generati...-premix-60867/

Just did .... Seems that guy didn't fully understand how it worked ;)

Yeah that thread has been around for years. Thanks for posting a link to that thread of yours, guess ill do some more reading.:D:

I've since updated my pre-mix to 8oz per fill-up, or roughly 0.5oz of oil to 1 gallon of fuel. No smoke or excessive fuel trimming, so I'll stick with it for now.

As far as the SOHN, it seems to be pumping an effective amount of oil. It injected about 32oz during the first 1,000mi break-in. It will be interesting to see what it does over the next 1,000 miles of normal driving.

JASO FC = ISO EGC
JASO FD = ISO EGD

Got it, Thanks!

what about upper cylinder lube lucas?

Since you guys brought up the sohn adapter, I recall someone on here telling me the sohn adapter leaves some areas of the engine unlubricared. Can you guys elaborate? Something like sohn kills track engines or something for lack of complete lubrication. I was searching for my post and his response but am having a hard time locating it.. I didn't see these replies. I though rx8club wrote me off for flicking the bird

Lots of people say lots of things. The Sohn isn't changing the injection pattern or volume from stock, it only changes what is injected. Premix should get oil into places the stock injection system can't, like side seals.

Are you kidding me? So the plate doesnt block off any lubrication pathways? I could have sworn it was teamrx8 who told me that.

I'm not kidding.

damn
now i have another item on my shopping list...

what do you guys think about the olddragger mod with the tranny cooler as a secondary radiator? I thought that was genius but i fear the car may run too cold. thoughts?

As long as it's thermostat- controlled, it won't run too cold.

And centre of the apex seals since there is still no middle injector.