97 Volvo, 203900 miles, 6000 Mi OCI
Out: bulk Castrol 10w30 conventional and a jobber filter (fast lube place that has since gone out of business)
In: Valvoline All Climate 10w30, Volvo filter from the dealer...I have a wholesale account so OEM parts tend to be fairly cost-effective for me. Good thing, because the other Volvo is eating me alive on repairs.