Dealer oil change using 5w20

[Mean Cat]

Another good point for Amsoil in the overall waste/ environmental department.

As long as it's recycled then it don't matter, then more new black top roads can be made to race our HC's on.

 

[Mean Cat]

Well that's what they put in back in 04. Now why did the coating come off a piston a scratch the cylinder wall?? You tell me. Every 3k and I brought them donuts Saturday morning when I brought the truck in for a GOF.

One cause can be that cylinder was not getting enough fuel & over heated the piston, so it was breaking down.
Or the rings were leaking by some on that cylinder & burning it up.
Or like said, defective piston from the start.