blitjen

Hello all, please answer this question does fuel octane have an effect on Rotary engines, I have tried several types and haven't noticed much difference, what does everyone else fill up with?

Thanks in advance.

DC5Daniel

iTrader: (10)

First tell us what car you have and what's been done to it, but the long and short of it is absolutely. Are you familiar with detonation?

misterstyx69

iTrader: (142)

If it is an N/A then NO...87 octane is fine,after that it is a waste.
Turbo cars?..then it all depends on what your setup is.

Evil Aviator

^ This

The octane rating is an anti-knock rating. Therefore, the configuration and condition of the engine, driving habits, and environmental conditions will determine whether high octane fuel is needed. The engine will tend to knock if the fuel octane rating is lower than necessary, and it can result in poor performance and engine damage. It is OK to use a fuel that is of a higher octane rating than necessary, but it accomplishes nothing other than draining your wallet.

This applies to rotary engines and piston engines.

Jacob Ratty

With using the higher octane on a 13b tt, is it recommended to add a lubricator (2 stoke oil)? I have a bridge port also.

blitjen

Thanks guys, all my 7's have been N/A's with the exception of my 94, it sounds like if I fill up with premium it's a waste of $$, I thought the same thing because I never felt a difference in acceleration.

Thanks again, Brent~

armans

iTrader: (2)

On your 94 you should use premium only

7krayziboi

iTrader: (15)

Yes always premix even if you have the OMP still working

ourx7510

iTrader: (6)

I premix with tcw3 oil 1 oz to a gallon with 93 octane s5 t2

Aaron Cake

iTrader: (1)

Bridgeported turbo means premium fuel only.

NAs can run 87.

Stock TIIs can run 87.

More than factory boost means premium.

If your metering oil pump in functioning and you are driving on the street, then premixing is not necessary. If you are track driving the car with a functional metering oil pump, I'd add about 0.5 oz per gallon of premix. If you don't have a metering oil pump, 0.5oz per gallon for street use, 1 oz per gallon for track use.

If you like throwing money out the tail pipe, burning the engine dirtier than it needs to be and fouling plugs, then sure.

Otherwise, no.

7krayziboi

iTrader: (15)

Haha , I do not want to get in a argument with you Mr.Cake.
this advice's been told to me by I would say a pretty reputable *Canadian rotary specialists...

wondering why two rotary specialist (that I have lots of respects for) different opinion on premix

I always premix my FD and my S5 NA

misterstyx69

iTrader: (142)

One thing that you need to take into consideration is that the S5 either gives the engine oil..or it doesn't.
Reason?: it has an electric OMP,so if the thing acts up the engine goes into limp mode and you simply can't drive the damn thing until you fix it!
NO Premixing in the world will fix this as it would be an electrical problem and not a lubrication problem.

Now,premixing with an OMP is just an added measure of security to assure that the engine gets plenty of lubrication BUT there is such a thing as too much.
As Aaron said,fouling plugs is one of them.
SO,if you have an OMP then you can cut the Suggested amount of 1 ounce to 1 gallon down to 1/2 ounce per gallon.

Aaron Cake

iTrader: (1)

Different people will give different advice based on their opinions. Sometimes those opinions are formed based on observation of evidence or fact, sometimes they are based on repeating the advice heard from others, sometimes they are based upon superstition and unsupported opinion.

Assuming the metering oil pump is working as it should, then no premix is necessary. As mentioned above, if the pump has failed, that is another story. Which is one of those things one determines by checking the oil every fill up, as one should on every vehicle.

Jooiky

west cost 91, or 93 if you have it, and premix?!

Sgtblue

iTrader: (16)

Use premium gas only on the turbocharged car. If your 94 is at stock boost levels, that means 91 minimum for safety. I wouldn't drive all over town looking for it, but if you can find 93 without serious inconvenience, I would get it. You won't find any noticeable improvement in performance, it's for safety. The rotary engine doesn't tolerate knock...sometimes referred to as 'pinging'. It destroys hard seals which destroy your engine and usually the turbos.
So do I, but I also have WI to deal with the additional carbon and don't automatically suggest doing both or make it out as something critical. Regardless, it has little to do with the OP's question.

cayangco

iTrader: (1)

yes NA cars need 87. the easier to burn the fuel the better, especially if your running premix. premium should only be used on forced induction cars since it helps to prevent detonation