Clearing out some of my older items in my stash...
1999 Pontiac Firebird 3.8L V6
86,408 miles
3,021 miles on current fill.
In use for 7 months, including a few months of storage. I drive the car as it was intended to be driven -- spirited, which is why I change the oil more frequently in this vehicle. It does get driven hard from time to time. It was also in use in some below freezing temperatures before and after storage. I forgot to mention that during the time of filling, I only put in about 4 quarts and the car takes 4.5 quarts. At time of change, it was right at the add mark, so it was consistently run a half to one quart low the entire OCI.
Out: Mobil 1 High Mileage 10W-30 (API SL), Carquest Blue 85040
In: 5 qts Quaker State Q Horsepower 10W-30 (API SM), Fram Xtended Guard XG3980 (5+ years old)