hello to all. love my olds, but not thrilled with my mpg. any ideas for improvementwould be welcome. org mpg was 20-22 combined with amsoil lubricants and 195 thermostat. same variables(brand of gas,weather conditions,driving style, etc.) using acetone getting me to 24.5-26.5, but we need more. org #s were 19-29; new updated standards say 17-26 which validates my fuel efficiency or lack there of. with acetone beating the new,real #s considering hwy miles are at 70+mph. tell me what you are doing to improve your FE. thank you. by the way, my 3800 is not supercharged.