I drive one of mine about 18-20K/year......90% highway. The FSS lets me go about 8,500 miles between oil changes....I always change it when it still says about 1,000 miles left. Mobil says at least once per year.

Just crossed the 60,000 mile mark ('07 stick with Lifetime Powertrain Warranty)....installed a new fuel filter $35 shipped from Rock Auto + $44 shop fees.....dealership wanted $299 for parts & labor.