Castrol GTX 10W-30
1996 Chevrolet full size pickup
350 cubic inch engine (L31)
93,463 miles on vehicle
3,442 miles on oil
Oil in service Dec. 7, 2003 to May 6, 2004 (6 months)
AC Oil Filter, Fram(!) Air Filter
Makeup oil: none
Here are the results: Mine/Universal Averages
Aluminum - 4/8...