They probably used oil with friction modifiers which are so slippery they will make the clutch slip. I would change to rotella put on a few miles then change again. Make sure nothing is in the bottom of the circle on the oil you use.
They probably used oil with friction modifiers which are so slippery they will make the clutch slip. I would change to rotella put on a few miles then change again. Make sure nothing is in the bottom of the circle on the oil you use.