Quote:
Originally Posted by Idle
I knew a guy that wore out his Mustang motor in 72,000 miles. The mechanic told him he was using the wrong grade of oil.
According to the mechanic (and I don't know much about Fords so I am just repeating what I have been told) the oil return holes in the heads are too small for the higher weight oil to run though at a speed needed to supply the oil pump. Therefore oil tends to get trapped on top of the heads and is not getting back to the oil pan fast enough to be pumped in the correct volume.
He started using the correct grade of oil and after nine years he still has the same used engine that was installed to replace his original.
|
What exactly does "wore out" mean? How did the mechanic determine what was wrong? Was a teardown done?
I just pulled off the valve covers of my GM 350 L98 motor. The holes are pretty large (at least 3/8 inch if I am viewing it right)
Doesn't say much. Without a teardown, how would anyone know why it failed and how the oil helped?