the station by my house just started selling non-oxigenated gas which I understand is ethanol free. The octane rating is 89. the stuff they sell with ethanol is 87 octane

The sign on the pump says small engines, outboards and classic cars. Anybody have any thoughts on running this in a stock 12A rotary engine?

Some of the locals say it helps their mileage but I have not run it in any of my stuff except the snow-blower. I did not see any improvement in snow blowing mileage

thanks, Keith

 

You don't need an 89 octane is your 12A..more like 83-85.
The regular type gas is 87?..good enough.
any more on an N/A and you are just wasting money.

 

one of my mustangs has a 289 that is running about 10:1 compression. I'll probably use it in that but not the other cars.

thanks again, Keith

 

Just remember this, no car designed before the mid to late 2000's is designed to run on gas mixed with ethanol. Does your car need 89, no....but it will run better on the ethanol free gas.
Check out http://pure-gas.org/ and click on your state for a list of gas stations in your state that sell ethanol free gas.

 

It should yield better gas mileage and better power. However, you may want to use the ethanol-enriched gas if it is cheaper, depending on the difference that you get in gas mileage.

Cars have been designed for ethanol since the 1970s. The FC RX-7 was designed for up to 10% ethanol as per the owner's manual. I don't have a manual for the SA/FB, but I am not aware of anybody reporting problems from using 10% or less.

Yes, ethanol is junk fuel.

 

the non-oxigenated stuff (straight gas) is about 8-10% more per gallon than the gas that contains ethanol. I gues it would only makes sense if my mileage increases by at least 10%.

I've only tried one tank of non-oxigenated and that was in my 68 mustang (stock 302) on the way to put it in storage. Really was not much of a test.

I apreciate the advice. Since I'm newbie when it comes to rotarys I'd rather ask you guys for free than pay for lessons at the repair shop.