My daughter just got an '06 Acura RSX. It's the base model. It's got 57K miles on it. I would classify her driving habits/mileage/usage as normal, not severe. She'll use it probably 50/50 city/highway. The manual calls for 10K mile interval oil change with dino for normal driving. I'm thinking that is a little long for dino. I see that AAP has Castrol Edge with Syntec and a Bosch Distance+ filter for $24.99. I'm thinking this would be a good choice. How about you guys? Can the Edge w/Syntec handle a 10K mile interval? I looked in the fill hole and it looks very clean. It calls for 5w20.