2007 Duramax 8,092 miles on oil with no makeup fluid. AC Delco oil filter. 238,150 miles on motor.
Nothing but a stellar report to share! Did not drain all of this batch, only used my fumoto valve for a sample. Blackstone recommended a sample at 12,000 mile mark.
Happy reading all!
Nothing but a stellar report to share! Did not drain all of this batch, only used my fumoto valve for a sample. Blackstone recommended a sample at 12,000 mile mark.
Happy reading all!