Thanks, we'll give it a look see.

Car has 80,000 miles is well maintained, 3,000 mi. oil changes, good tires. MPG dropped from 24+/- to 18 (done with calculator not car computer.) PCV checked with new timing belt, tune-up 6 months ago. Run a tank of mid-grade or premium every 4th or 5th tank and get not much if any improvement in MP...