I got my 2006 C2S about 6 months ago. I have been running 93 octane from Shell without any issue. I know they put up to 10% ethanol in their gas. I just found a place that doesn't put any ethanol in their 87 octane.

Is it better to just run the 93 with the ethanol and the fact Shell is pretty good about using quality detergents in their gas or is it better to run the 87 without ethanol and add an octane buster and cleaner?

Thanks

 

Run the 93. There's no place in your manual that says use mid or low grade gasoline to avoid Ethanol.

 

Deff 93... 87 is like drinking absolut vodka.

 

As opposed to Belvedere?

 

 

You'd probably have to put in a dozen or more cans of octane booster to even come close to 93. I wouldn't put any octane booster in my car.

 

Oh how I miss the days of Chevron Custom Supreme 105 octane...

 

Classic!

Only Chopin for me.

And 93 for the car.

 

.25 Cents more a gallon now saves you 20K in the long run....