Oil Level
Lead Driver
Joined: Jan 2005
Posts: 7,782
Likes: 221
From: Huntington Indiana
If you do a quick drain, some of the oil doesn't all drain out leaving about 1.5 qts in the engine. So if you put in the amount listed in the manual, then you will be 1.5 qts overfull which could damage your engine. Thus the reasoning for the 13.5 qts. Hope this helps
Postmaster
Joined: Aug 2003
Posts: 4,483
Likes: 2
From: Central Texas
More specifically, overfilling the engine causes the oil to foam resulting in a rough running engine. It will also try to force out of the engine which will come out of the crankcase vent into the turbo inlet, etc.
