Give me some reasons (I need HELP) - Ford Powerstroke Diesel Forum
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post #1 of 6 Old 03-11-2008, 06:18 PM Thread Starter
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Give me some reasons (I need HELP)

I have a 1989 model F-Superduty (F450). It has relatively low miles (Odometer says 99,000-its probably 199,000, but the title says exempt because of age). I just bought it and on the trip home (300 miles) it burned 11 quarts of oil. I had a mechanic look at it, and he claims that there is nothing wrong with it other than that it is geared extremely low. The oil didn't leak out; it burned out. I was running the truck 65-75 mph down I-95, and the mechanic says that it is built to be run no higher than 50-55 mph. Is this a reasonable explanation for that much oil to be lost? I would appreciate any insight that you guys can provide.
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post #2 of 6 Old 03-13-2008, 12:28 PM
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That's alot of oil sounds like valve guide seals or rings or both most of those trucks had 4.63 or 4.10 in the rear end but 65mph should not be to big a problem with either ratio. unless you running the wrong oil?? but 11 quarts is rediculous even if you were running 10W30. I would go get a 2nd opinion from a good diesel shop. May also be the CCV?

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post #3 of 6 Old 03-13-2008, 12:46 PM
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WOW that's a lot!!!!!

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post #4 of 6 Old 03-13-2008, 12:50 PM
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You should have 5.13:1 rears. Those trucks do not like anything over 75mph, but 65 is fine, all day long. There is a reason the oil went somewhere. Probably rings, and valve guides. A little oil usage is normal, but that much means a problem.

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post #5 of 6 Old 03-13-2008, 01:08 PM
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11Qts. in 300 miles?? Were you able to see anything behind you? That's extreme.

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post #6 of 6 Old 03-13-2008, 01:15 PM
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THATS NOT RIGHT THAT IS ALOT OF OIL.MAJOR PROBLEMS RINGS ,CRACKED PISTONS WHO KNOWS IT SOUNDS LIKE YOU NEED TO DIG A BIT DEEPER DOES IT SMOKE ARE THERE ANY MAJOROIL LEAKS????
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