Over 33,000 miles a year. Round trip to work and back is over 150 miles. All those miles are on a 2002 Suburban 1500. Yeah I know I screw the environment at 15mpg. It has over 265,000 miles and the only repairs on it have been a water pump, ujoints, front and rear bearings and shocks. Power steering is going next and it leaks out of the rear main seal but I'm putting it off until the tranny drops.
Here's one for Jdub.....I have only used Walmart synthetic 5w-30w since day one with purolator or delco filters. Oil changes every 5000 - 7000 miles.