Burnin Oil
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Senior User
Joined: Nov 2003
Posts: 263
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From: Royal Palm Beach, Fl
Burnin Oil
My 98 F-150 4.6 just turned 185,000 miles and it's burning oil all the sudden.
I bought it new and changed the oil every 4,000 miles without fail. This truck has had all the maintenance required and more. In the last 5,000 miles I had to add 3 quarts of oil. The exhaust isn't smoking and there's no oil stain on the garage floor. I realize normal wear can be the reason. I wonder if there might be some other cause I can look for. Any help would be appreciated.
I bought it new and changed the oil every 4,000 miles without fail. This truck has had all the maintenance required and more. In the last 5,000 miles I had to add 3 quarts of oil. The exhaust isn't smoking and there's no oil stain on the garage floor. I realize normal wear can be the reason. I wonder if there might be some other cause I can look for. Any help would be appreciated.
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Senior User
Joined: Nov 2003
Posts: 263
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From: Royal Palm Beach, Fl
Galaxie641 May be Right
I bought a new PCV Valve from Autozone. I should know better.
My understanding is that it is an air flow check valve. When I removed the existing one it was fairly clean, it did rattle and I could only blow through it in one direction. (Crankcase Out). The one I got from Autozone ($3.50) I could blow (Crankcase in) with resistance and crankcase out without resistance. Isn't it supposed to be air tight toward the crankcase.
My understanding is that it is an air flow check valve. When I removed the existing one it was fairly clean, it did rattle and I could only blow through it in one direction. (Crankcase Out). The one I got from Autozone ($3.50) I could blow (Crankcase in) with resistance and crankcase out without resistance. Isn't it supposed to be air tight toward the crankcase.
Elder User
Joined: Nov 2005
Posts: 788
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From: Cottage Grove, Minnesota
My dad told me that when I replace mine to get it from the dealer. I plan on doing it soon as I am nearing 200k miles and I have put 30k on since I got the truck. All I know is my PCV has upwards of 50K+ miles.
