Acutally I bought the non tc-w3 one. It is just called supertech 2 cycle universal oil.

I think after this tank of gas I am not gonna use premix anymore... seems it does more harm than good. I think with the opm just making sure u change the oil before it goes black at 3k miles should be good. ughhhh I hope it goes away.. thinking about taking it on the highway tomorrow and running it hard.

 

Yup, a 3,000+ post thread that discusses premix would ultimately conclude with that. Even after 40+ years of rotor-heads premixing, Le Mans 787B, etc... and that the third oil injector (that covers the apex seal) was added back after being vacant in the series 1 RX-8.

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You added premix and later it started running "rough". This would point to a fault somewhere in your fueling system, likely the fuel sock (or that you added way too much). The sock will clog quickly when premixing. Find the DIY, and get it cleaned.

 

I have been driving RXs since 1973 on street and track with premixing. I have NEVER had a single rotary engine failure in all that time. The proof is in the pudding as we say. Don't premix and take your chances. Premix and "may the force be with you" Your running rough is not a result of proper premixing with a proper rotary premix.

 

There is no proof and no pudding. Engine failure depends on many, many factors and there is no proof premixing does jack S%!t to pro long Renesis engine life. And the fact that they used it on race engines 20 years ago and still used it on RX-8 race cars means nothing and in no way compares to a street driven Renesis. It may help on a street driven Renesis, it may not, NO ONE knows because there has been no real testing done to determine if it does or does not (at least that we know of).

And Gwilliams, how many miles are on you r RX-8? I am willing to bet it low mileage and likely not a daily.

 

I haven't personally seen any comparisons between a premixed rx8 and one that's been run on OMP only. However, I still premix with idemitsu.

I bought my RX8 used with 50k-ish miles on it a couple years ago, from an experienced owner. Its my daily driver, short trips to and from work and everywhere else. I've put close to another 15k on it since that time and I haven't had a single problem with the engine. Had to replace the battery recently, but that was it. Oh, and the heater control **** problem, which I fixed with a soldering iron and some great instructions found elsewhere on this forum!

I've done regular maintenance on it however, tranny and diff oil changed, oil changes (4 to 6 months-top off as necessary as well, which isn't often) spark plugs and ignition coils. Still need to do the coolant, probably sometime this month.

She runs like a top and starts much quicker than any other rx8 I've checked out. Never had a hot start issue either, even after a 300+ mi trip to arizona in the summer. Maybe I'm lucky or maybe its the premix, who knows. I wont stop using it, that's for sure.

 

Of course there are many ways to not properly use and care for a rotary engine and get an engine failure. I have driven way over a million rotary engine miles in seven RXs since 1973 and premixing has helped me eliminate one source of possible engine failure. BTW my RX8 is my daily driver and has around 50,000 miles on it, Past RXs of mine,street and race-prepped , all were over 100,000 miles before sold or traded and were all still running with the original engines, with one of those rotary engines heavily modified up to 400+ hp by Racing Beat.

You are wrong about no testing on street driven Renesis engines. Both Racing Beat and Pettit racing claim to have done extensive testing to show the benefit of premixing on both race prepped and street engines. But hey, if you are set on not believing anyone's but your own expert opinion, then so be it. I will continue to premix along with properly caring for my rotaries and enjoy long life and thousands of happy miles and smiles. The best to you my friend.

 

cmon 9k ... he's driven lots of miles on a rotary engine, and has had his engines heavily modified (*cough* by others *cough*)... he knowz a lawt.

 

Me too...

 

Okay, 50,000 miles is nothing. Racing Beat and Pettit claim a lot of stuff. We have all seen Pettits protek "test" video. They may be decent companies but at the end of the day, they offer no scientific proof of anything and it is their goal to sell you product so any opinions they have about that product are biased.

I'm not against premix and I run a SOHN adapter and inject Idemitsu. But my point is that most of the points on premix are just personal opinions and yet some take those opinions as fact when there is no data to show that premixing a series I Renesis is beneficial.

Gwilliams, you have owned a lot of rotaries, we get it. But that in no way makes you an expert on the effectiveness of premix or anything else rotary related (same goes for the rest of us). You have just had good luck with previous rotaries so of course you think they are super reliable. I respect your opinion but anytime something doesn't do damage doesn't mean it is helping. People swear up and down that a lot of things work but without good science to back it up, it doesn't mean much. And there is no science that proves premixing does anything to prolong the life of a Renesis.

The engineering faults of the Series I Renesis are well documented and the changes made to the Series II Renesis speak for themselves. Premix does not make up for the deficiencies in the series I Renesis design.

So if any of you want to premix that is fine, just understand that it may not be doing anything beneficial for your engine. And people, for God's sake. please stop saying it makes your engine idle smoother and run better.

 

Idemitsu makes my car run smooth, like warm butter!

 

Holy cow, the butthurt is unbelievable for almost 10 years. Lmao. Some good(?) info though. Looking of running some premix and going to experiment with a few different brands.

 

Premix make my car idle so smooth, I was not even aware it was running!

 

 

Dude, you knew it was coming lol

 

Ive gone through two starters already....because the idemitsu makes my car prius quiet and i always try to start my car when its already on lol

 

Is there any consensus (yeah, I know, right?) on premixing series 2 cars?

 

I have 2000 miles on my premix experiment and I think I will keep pre mixing. Some bang their heads but as it was said there is no proof yet but that does not erase the premix smoothe ide and better gas milage. Some still obviously believe the world is flat I guess.

 

Well the series II's have the mechanical issues worked out (new oil metering system, oiling setup,etc) so I would say premix would be an added benefit. I would premix 1/2 oz per gallon if I had an S2.

 

What do you mean? So the supposedly more reliable S2 can actually have more benefit from premixing? Mind to share more info?

 

Premixing is a CHOICE.
Just like the S1, the S2 CAN benefit from added lubrication to the chamber. There is nothing magical or mysterious about 9k's reply. Just read through the thread, weigh the pro's and con's and make your own informed decision.

 

Yeah, the series II has the mechanical improvements that have proved to basically make the Renesis pretty reliable now (it's no Toyota SR22 but still).

Premixing a series I does not make up for the inherent designs flaws of the series I Renesis. Premixing a series II will aid in cooling the side seals and in lubrication. It can't hurt. But even if you don't premix a series II it will likely last for a decent amount of mileage anyway. But we all know heat due to the side exhaust ports is a factor in premature failure in some of these engines so adding cooling and lubrication to them cannot hurt.

So if you plan on keeping your series II for many miles then premix. The only reason these engines don't come with a premix option from the factory is because Mazda knows people can barely be bothered to check their oil between changes, let alone add premix to the gas tank or to a reservoir.

 

^+1

That should be an option on all future RX models...

 

To the extent of the design pre-mixing is beneficial to both engines series one and series two as apposed to not pre-mixing. Maybe the series two can benefit more than the series one, but so what?. It is beneficial to both series engines at least according to Pettit Racing. I am sure Pettit is selling the Proteck they recommend can extend rotary (engines) life by 30% or more? Pettit Racing
I have a 2004 series one renie and I have been pre-mixing and after aa tad over 84,000 miles now all I can say is for me and my 8 pre-mixing is very beneficial if for no other reasons than better idle, quitter engine, more responsive since the addition of pre-mixing. There are a lot of political reasons Mazda did what they did and why they don't recommend using syn oil over dino and the beat goes on lol.

 

I think WTB eluded to that. lol lol.

 

I thought this was a pre-mix thread?