......if I put 91 octane and octane booster in my tank, would it somehow make the motor run hotter? She ran a little hot last night for no apparent reason.

I've been running Union 76 100 octane race gas, but had a bottle of O'Reilly Auto Parts brand booster in my garage that I wanted to try. Race gas is $7.79/gal here. Trying to save a little money. (please, no lectures) :

Mild 440 street motor, normal aspiration.

Last edited by BFASTER; 07/28/11 08:20 PM.
1969 Dodge Super Bee Hardtop 2007 Nissan Altima 3.5SE