Originally Posted By: OtisBlkR1
As my 5.3ltr silverado now has 66,xxx on the clock i put around 3/4 a quart of MMO in the sump as a top off around a month ago and 4,000 miles on the current OCI mobil 1 5-30 I added around 600 miles this past month for 4,600 miles and i pulled the plug today...