Quote Originally Posted by andytlr View Post
That's exactly what I'm doing. I suspected that might be the case. I put in $20 of premium 95 and did 100k's with it (I do a lot of peak hour driving) and I put in $20 of premium 98 last night. See how it goes.
How did you go with your tests?

A better test would be to run to empty then fill up with one, run a full tank, then fill up with the other. You will get a much more noticeable difference over a tank. If you don't, well there is your answer. $20 is only about 15l or so you may not notice a difference, even if there is one.

(well technically it would be best to run a few tanks of one, then a few tanks of the other and average them, but lets not nit pick).