What grade gas do you run in your Discovery?

 

medium or high pending on prices, the low grade, from what I am told with gum up or just screww up you filters and lines I don't know if that is true but I don't want to find out.

 

If you have the high compression V-8 you need to run the highest octane
you can get. If not your knock sensor will work over time and retard the
timing (less power, less mpg's) if the knock sensor quits you will mess
up a motor for the 2 dollars you save on a full up.
Here in the flat lands I get 92 or 93 octane.
Would you run the wrong oil?

 

I've tried all three. I noticed a fairly big difference between regular and mid-grade, but almost no difference between mid-grade and premium. It's hardly a scientific process, but I've come to the conclusion that the extra $.10/gallon you pay for premium just isn't worth it.

 

Benhamtroll you said " but almost no difference" to me it's about
piece of mind and many more miles.

 

Depends, in the winter (when cold) i can get away with 87 octane. In the hot months or wheeling, i need to run the 89-91 octane, or the beast will start to ping and detonnate.

by the way forbin10, lower octane will not plug or gum up yuor lines.