D3U1LT

Switching from full syn. to non syn. Any consequences? I dont see the point in using a high dollar oil for stock d15b7. I have some regular 5-30 I want to throw in but I dont want to ruin any life of this 40k mile gem i picked up.

Rigginit

You can fully drain it then change safely more than likely. but with synthetic oils, the time between oil changes is increased and some garuntee up to 10,000 miles between. Syn. oil compared to normal is about double price around here not sure about your area. But with the mileage to price ratio. It balances about the same to me. Might wanna keep this in mind before changing. not to mention synthetic does better while its in the motor as well ^^. possibly a change to a different brand synthetic might be better for ya.