oil usage
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Joined: Nov 2003
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From: great falls montana
oil usage
Hello I have an 04 f150 5.4 I use mobil 1 5 20 . Truck has 87000 on it .It starts using oil at about 3500 miles.I try to change at 40000 to 5000 miles.Any ideas thanks.
Sick 'n Tired
Joined: May 2006
Posts: 2,969
Likes: 47
From: League City, TX
All engines consume at least some oil. It is essential for the proper lubrication of the cylinder bore walls and piston rings. That oil is exposed to combustion and some will burn off. Now, how much is acceptable is a matter of great debate. Ford says in the service manual that depending on driving habits 1 quart every 1500 miles is possible. Customer driving habits greatly influence oil consumption. Mileage accumulated during towing or heavy loading generates extra heat. Frequent short trips, stop-and-go type traffic or extensive idling, and preventing the engine from reaching normal operating temperature will cause increased consumption.
If you're consuming more than a quart every 3000 miles and you don't expose your rig to the above driving conditions look to the following:
Malfunctioning PVC system
Worn piston seals
Worn valve stem seal
Worn valve stem or guide
Worn piston ring groove
Worn piston or cylinder
Of course most of the above could only be diagnosed after an extensive compression and leak test.
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If you're consuming more than a quart every 3000 miles and you don't expose your rig to the above driving conditions look to the following:
Malfunctioning PVC system
Worn piston seals
Worn valve stem seal
Worn valve stem or guide
Worn piston ring groove
Worn piston or cylinder
Of course most of the above could only be diagnosed after an extensive compression and leak test.
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