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Old 09-29-2009, 01:09 PM
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Oil issue

Hey guys, just bought an F250 a month ago. Previous owner just had everything greased, oil, oil filter and air filter. Found out that they used 15 40 motorcraft oil. Checked the oil today and saw that it is 2 quarts down. I have put 800 miles on since I bought it. Is it normal for a 7.3 to use this kind of oil or is it the type of oil? I'm going to change it and put in Shell Rotella anyway but just wondering on about the oil consumption. Thanks!
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Old 09-29-2009, 05:49 PM
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Any ideas guys?
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Old 09-29-2009, 05:52 PM
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How many miles are on it. I have 105k on mine and use no oil between 5k changes. i go between rotella 15-40 in the summer to rotella 5-40 syn in the winter.
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Old 09-29-2009, 05:54 PM
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first off , just because he had it changed doesnt mean it was completly filled , before assuming anything , change the oil again if you want or if it were me i'd top it off , make sure you know where it is on the stick and then drive it and check it again in 800 miles , and for the record , the motorcraft oil is as good as anything out there
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Old 09-29-2009, 05:58 PM
If it aint a CAT itsa DOG

 

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I was going to say the same thing scuff. If its in the middle of the crosshatch it maybe wasn't filled up all the way. I have nothing against motorcraft oil. i just use rotella.
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Old 09-30-2009, 09:40 AM
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I notice a big difference in the oil level on the dipstick when parked on slightly different slopes. Meaning the dipstick must not set vertical but sorta sideways. So top it off and check for consumption parked in exactly the same place.

I use delo400 15-40 year round. Have a daily 8 mile commute each way plus 50 mile tows every other weekend and see about two quarts of consumption over the 5000 miles. Short drives and cold weather make it worse. Long drives consume hardly any. Must be due to the reduced clearances when the engine is fully warmed.
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Old 10-06-2009, 07:10 AM
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RCS15150,
I use shell Rotella in my '00 7.3L. My rigs got 160,000 miles and it burns off a quart every time I fill it to spec. I've read and heard that each diesel engine is a little different and has its own little attitude. Change your oil a couple of times and fill it to the manufacturers specs. Log the before and after volumes. Assuming you have no leaks and your soot is under control, you should be able to pinpoint the volume of oil your engine needs to run smooth and cool, without burning off any extra.
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Old 10-06-2009, 07:40 AM
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i agree with everyone else. change it yourself and use that as a baseline. after that if its still using that much oil then we can start proper diagnisis.

do the injector o-rings fail on these like the OBS?
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