Ethanol /Premium Gas Mix 93 oct vs 92 Premium ethanol free

[Racer Boy]

The 92 octane ethanol-free gas will make more power than the 93 octane ethanol blend, if that is a factor for you. Probably not enough that you probably would notice any seat-of-the-pants difference, but it would probably show on the dyno.

[JohnRedS]

As a person in the gas business, here are two cents about BTUs. Ethanol contains 92,000 BTUs per gallon, regular no lead comes in at 132,000. Personally, I have run both 93 E10 and 90 REC Gas without an obvious difference in performance. As a previous poster pointed out, octane and energy are not one in the same. I do have serious misgivings about ethanol in general and storage with ethanol blended fuels in particular. Phase Separation can be a real issue in a fairly short period of time. Our suppliers claim a 90 day shelf life on blended fuels. If you do not have access to pure gas for storage, modern additives seem to be pretty effective in delaying it.

[10/10ths]

..is hydroscopic--it absorbs water.

If you have a reliable supply of pure gas, even if it is a couple octane points lower, run it.

Your knock sensor will detect the lower octane and pull ignition timing, so no damage will occur. You will only notice the torque drop, if you notice it at all, below 2,000 rpm.

Ethanol is just bad.

Run Shell pure gas if you can, or buy some pails of "T4" from VP Racing Fuel

Here:

https://vpracingfuels.com/product/t4/

I've run this in my Boxster, Ducati Monster with hi-comp pistons, RC51, and GSX1250FA. They love it.

[Lew]

Originally Posted by 10/10ths

..is hydroscopic--it absorbs water.

If you have a reliable supply of pure gas, even if it is a couple octane points lower, run it.

Your knock sensor will detect the lower octane and pull ignition timing, so no damage will occur. You will only notice the torque drop, if you notice it at all, below 2,000 rpm.

Ethanol is just bad.

Run Shell pure gas if you can, or buy some pails of "T4" from VP Racing Fuel

Here:

https://vpracingfuels.com/product/t4/

I've run this in my Boxster, Ducati Monster with hi-comp pistons, RC51, and GSX1250FA. They love it.

I think this juice might be the same as a product called KARTANE. It had a splash of Methanol. I used it when Karting. Unusual exhaust smell!

What I am running in my PBS is Shell's 93 E Power, and the Shell Diesel which has the highest Cetane which is around 48. Adding Power Service in the diesel fuel also helps boost the power.