I've always put Pennzoil 5W30 in the Contour. Since it's recently been booted from the garage to make room for the wife's new Explorer, I'm going to start using Mobil1 5W30. Winter's get pretty cold, so the extra protection should be worth it. Mobil1 is all I put in the Mustang. Probably do the same for the Explorer. I definitely wouldn't change the oil any sooner than 5,000 miles with the synthetic. BTW...I use a Bosch oil filter on the Contour since I (for some reason) trust that more than the Frams they have at AutoZone. Anyone know how they fare?
