152K car, a little over 3K oil, last changed 10/17/14.
We had a rainy summer and the car spent most of it sitting in the garage.
Out: Defy 10W-40, STP cartridge filter.
In: Defy 10W-40, Mahle cartridge filter.
The Mahles cost about the same online shipped as the STP does from AZ and the Mahle is presumably a better piece.
The Defy was less than zero after clearance pricing and MIR.
I still have one jug of it left to use.
04 Impala Out: Mix of Valvoline Next Gen and Valvoline Next Gen Maxlife and Microgard filter.
In: 2 qts of Valvoline Next Gen, 1 qt of Valvoline Maxlife, 1.5 qts of Valvoline Next Gen Maxlife and PF47 AC Delco E-core I got for free
08 Silverado Out: Mix of Valvoline Next Gen and Valvoline Next Gen Maxlife and Parts Master filter
In: Formula Shell and PF48 AC Delco filter
2000 Audi 4 pot turbo sport quattro. 102,660 miles
Out Tetracil, synthetic VW 505.01, 5-40, had been subject to 4X 5-800 mile oil changes as a gentle clean.
In Back to Fuchs [nee silkolene] titan Pro S 5-40 ester.
Mann filter 940/66 [not the biggie!]
oil on dip 3mm below top bend of dipstick, total oil used 3.9l