hey guys, i've done lots of searching but came up with mixed answers. i change my own oil in my 1994 camaro Z28 with the LT1 now with 95k miles. since i live in so. cal i use Valvoline 10w30. i personally just use non-synthetics since im cheap and AC Delco filters, but i had always thought Valvoline made decent oil but it seems as some people don't agree especially in the test result area. what are some good brands you can buy off the shelf for non-synthetics. i also change my parents' cars' oil which includes a 2002 Nissan Xterra S/C (10w30) and a 2002 Ford F-150 (5w20) thanks for any help. -tyler