[bell]

couple questions......

1....did they change the oil and filter?
2......did they charge him and give him a receipt?

if the oil was milky it would've revealed itself when they drained it....did they tell him before completing the oil change?...however if it was not and they started the truck with no oil then there is a chance that they contributed to the damage, if he has a receipt that will be his only recourse to have them pay for it.....
with a claim like that he'll deal with their insurance company so need some sort of proof....