Our Uplander has always had dino changes at the local shop. Just this last change I started doing it on my own. I chose Pennzoil Syn Blend 5w30 and Purolator Classic. Have a planned oil changed coming up in 600 miles. This car sees ONLY short trips, its driven by my mother, to and from work and to get groceries. Work is less than one mile away. So it rarely if never sees operating temp. She walks to work sometimes but its usually too hot, or raining so the van is more convenient. The only times it gets up to temp (maybe) is the 6 miles trip to walmart (one way) every now and then. I would like to switch to synthetic maybe if it would help reduce wear. Its the 3.5 liter pushrod V6, non vvt. Also what oil filter would you recommend? Im open to dino, syn blend, and full synthetic (group III)