smart General Discussion
My first tank yielded 37.6 mpg. My second tank yielded 35.4 mpg. I checked my third tank mileage and found I azm down to 32.2 mpg. What is going on?
* I drive mostly highway miles to and from work.
* I only use 91 octane Chevron gasoline.
* I am using the automatic D gear more often to...