Yup, only 6,200 miles on an '04 Silverado 2500HD with the 6.0 I just picked up last week. I guess I can't use my name anymore. Anyways, I've had a hiatus when it comes to the auto industry since I no longer work at Kragen...yes!!! 5 years was enough for me. The last time I was here heavily, many people seemed to like Chevron due to it's nice additive package. Here's what I plan on running; Chevron or Castrol (swaying to Castrol) 5w-30 with a Napa Gold oil filer. BTW, what are peoples thought on the GM oil life system? I'm a bit skeptical and still plan on changing the oil around at the usual 3000 miles since I only do about 8500 miles a year.