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Dartz

Premix ratios for RX-8

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Just a quick question, wondering what sort of premix ratio s people run on Rx-8's, or of it's even worth bothering. I've heard some suggest a ratio as high a 100:1, or 600ml 2-stroke oil to a full tank of fuel.

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Unless you have deleted the oil metering pump it's not a requirement. Doing so won't harm the engine so it might be worth doing. I have an rx7 and add 150ml to a full tank but the rx7 has a bigger fuel tank than the 8 so the 8 should require less.

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600ml would be crazy for day-to-day driving. Most people run between 100 and 200ml per tank. Personally I throw in roughly 100-125ml per tank. Exactly how much it helps is debatable but most agree that it is at least of some benefit. Theoretically it'll lubricate places the oil from the OMP injectors won't get to, and it also softens carbon helping prevent build up. Edit: If you do a search there's a couple of fairly recent threads here already discussing it.

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The first time I did it I poured in over half the bottle. (About 600ml) and had loads of smoke with a very strong smell of a chainsaw. I wont be doing that again! After learning my lesson I now put in about half a paper coffee cup of oil in for a fill of petrol. Doesn't have to be exact. If I'm only putting a few quid in ill usually put a capful of oil in.

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Am I the only person who likes the smell of two-stroke? Maybe it's because I have fond memories of Zingers from somewhere in my childhood that I've forgotten. We'll see what happens with 200, I know it's never been fed 2T oil before.

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Easiest way to work it out is if you put in say €50 of juice stick in 60mil of premix, €70 fuel-85 mil premix.....roughly 20pc premix to whatever you throw in the tank.I use a syringe with measurements.....piece of piss

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Hi Guys, I've spent last 2 hours on various RX8 forums and this one re pre-mixing and can't get a concrete answer if I should pre-mix myself. So much info out there I'm drowning. I've an 03 RX8 with 148,000 Km on the clock with no issues, never been rebuilt. I use 15W40 mineral oil. Will I benefit using pre-mix with my setup. Thanks guys.

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Some specialists don't recommend it,others do.Tbh there's no downside with it.First time I used it I noticed almost immediately felt smoother and generally felt better but maybe that was just a placebo effect,who knows?!! it does help with carbon build up,there's plenty out there on the forums regarding stripped engines with and without the use of premix,the results are night and day.Regarding what you read about it,the only way to see for yourself is to start premixing but tbh I think you'll notice the difference.When I started premixing initially I didn't expect to see any difference but now I won't go without it

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Hi Guys, I've spent last 2 hours on various RX8 forums and this one re pre-mixing and can't get a concrete answer if I should pre-mix myself. So much info out there I'm drowning. I've an 03 RX8 with 148,000 Km on the clock with no issues, never been rebuilt. I use 15W40 mineral oil. Will I benefit using pre-mix with my setup. Thanks guys.
So did I. It's not something I asked out of the blue, rather I just wanted to see what people were actually using if they were (Why can't Americans measure things in proper amounts too, not bloody Oz's). I can sure understand the theoretical technical benefits, and had already been considering doing it before I started looking. My big concern was the Cat and how it'd respond - but considering it'd burn the oil much more completely than a 2-stroke piston engine outside it's powerband, and those are also available Cat'd (Yamaha's I think ) The only consensus I gathered is that it doesn't do any harm....

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I just put a quarter of a bottle (250ml) in with a full tank. Didn't notice any difference, tbh. But then I haven't had it for long enough to build up much of an impression otherwise. I'll let it run through with the current tank of fuel and see what happens. Probably hasn't mixed through, yet.

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You premix to improve engine longevity, not for any performance improvements. Some say they notice a difference in how it runs, but really it'd only be very slight so if you don't have it long chances of noticing any difference would be slim to say the least.

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In theory should help compression as the oil seals the combustion chambers. So on a low compression motor with a heavy 2 stroke mix the car should theoretically run better however you have to consider that the oil has a much lower flash point and not as good a fuel therefore meaning your fuel is less efficient and some power is lost, therefore benefits are negated.

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Way too many variables to consider for the amount of change it would make on the dyno, you wouldn't see any drop or gain in power as inlet temps and water temp map would have a larger effect.

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Something did happen..... after about 17km today the check engine light came on. After a run on motorway, and a crawl through a village I was just turning for home and it came on solid. Still running fine and smooth and all. Please tell me I didn't just fuck over my new car or the car's Cat somehow. It was fine yesterday, after I put it in. . Drove to work happily for a meeting, then back again before I added a half-litre of oil to the engine when I got home. It sat the weather out yesterday, and I just took it for a spin this afternoon which involved a full-throttle acceleration onto the motorway, a quick turn around, some more motorway running, then off onto a back road at 60kph when the light came on.

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