My wife and i car pool 50 miles one way,100(total)in our 1985 Chevy caprice classic. 305 4 barrel,think 2. 89 or 2. 73 rear gear 700r4 trans. I drive,set cruise etc average 17/18 mpg. She drives and most always gets 20. 5 to 21 or so. Last tank she hit 22. 1. Has hit 22 several times. Around 188,000 miles. It is totally stock,air pump,computer carb. etc. Only drive it to and from work,never on weekends etc. As stated earlier our 1998 dodge 1500 slt with 318 as never hit a 17mpg. Its gotten close,but never has hit it with her or i. We bought the chevy with 82,000 miles 5 years ago for less then $3000. Just had it painted this year,a vinal top 3 years ago,one water pump,one radiator,water pump,heater core and 2 sets cooper lifeliner 70,000 mile rated tires. Point is when its done want a 89 or 90 classic etc with a 305 again. Would never buy a new econo box. Loose to much money too fast!