I spoke with another GM truck owner this weekend & he was told by his mechanic NOT to use any synthetic oil in 1990 era GM v-8 engines....because "it will ruin the valve guides". Which he also claimed it did on his 1991 v-8 motor.
Does this sound in anyway plausable? As soon as he told me this, I figured that his mechanic just fed him a line in order to do the repair.
GL
Does this sound in anyway plausable? As soon as he told me this, I figured that his mechanic just fed him a line in order to do the repair.
GL