I have a 1998 chevy lumina with the 3.1 liter motor with 181,000 miles. I drive around 500 miles a week, I change the oil every 3000 miles and trans fluid every 25k-30k. It has the original motor and trans and might go through half a quart of oil between oil changes. I do a fair amount of highway driving and drive 70-80 mph everyday. How much life do you think I have left, at this point I drive about 24,000 miles a year. Do you think I can get two more years and 50,000 miles more before I need a motor or trans. Thanks for you help.