'99 VW Passat 1.8T Tip with 176,000 mi. Bought new.
Valvoline dino(free dealer service) up to 25,000 with 5,000 mi. OCI. Valvoline Synpower 5W 40 thru 130,000 or so mi. with 9,000 mi. OCI.
Valvoline Synpower 5W 30 up to now with 6-8,000 mi. OCI which is annually. Local garage uses this weight...