2002 Ford CVPI 166,400 miles (5,500 on the oil)
Replaced FL820S oil filter and topped up with 1.5qts of Valvoline Maxlife 5W20. It was down a quart when I started. Aiming for a complete change at 11k with one quart top up at about 169,150 which would put me a quart down again at change time.
1998 Chevrolet (Geo) Tracker.
Out: Peak Conventional 5w30 (1.4 years, 2800 miles, 100% city driving and 4 wheeling... 5qt jug from that Autozone $3 sale)
In: Pennzoil YB SM 10w30 (from that KMart gallon bottle extravaganza).