[Chiketkd]

Originally Posted by lee

Chike - here I go, getting ready to embarass myself by doing math in public, but....

using 20mpg on regular, 22mpg on premium (your figures), you would use 5 and roughly 4.55 gallons to go 100 miles. At $0.20 difference per gallon (what it is around me anyway) and using $2.25 and $2.45 (what I saw yesterday), the costs to travel the 100 miles would be:

$11.25 regular
$11.14 premium

so, over the course of the average driver's year (12K miles), the difference would be $13.64 cheaper to use premium - not to mention what savings would come about through less stress on engine internals.

Your math looks sound to me Lee. When I finally sat down and figured this out for myself back in college, I only put premium in my 300ZX TT and utilized the campus buses more often!

-Chike