I replace the air filter yesterday with a Hastings filter,the Oe was slightly dirty,but the sunlight was not showing thru,it had 17500 miles on it,I had done an oil change,using Pennzoil Platinum synthetic,I filled the tank,drove about 1 mile to the Southern State Pkwy,(NY),drove out east about 65 miles,the mileage has increased over previous runs,25.5mpg,then settled at 25.2mpg after a few local stops,the return trip was at 24.2mpg,average MPH was 60/70 ,Marty