Interesting article in the Post today.

http://www.washingtonpost.com/wp-dyn...080501595.html

The quick-and-dirty is that the sales of premium gasoline are decreasing with increasing gas prices, even in cars like ours that recommend premium gasoline.

Do others still use the expensive stuff? And do you think one would notice any difference in driving by using the regular grade for around-town driving, but switching back to premium before driving school events?