'03 Buick Park Avenue, 3.8 N/A engine, 46,200 miles:
2 qts. Chevron Supreme conventional, 5W-30
2 qts. Chevron Supreme conventional, 10W-30
12 oz. of Auto-Rx
Filter: Wix 51040 (the short filter)
My stash of 5W-30 and 10W-30 is gone. After the Auto-Rx clean phase, I'll go Chevron 5W-30 again (good deals at the Family Dollar store!), then in April, Pennzoil Platinum and the larger Wix filter for a 6-month, ~4500-mile OCI.