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oil at 50k?

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Old Mar 5, 2008 | 12:30 PM
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keith97xlt's Avatar
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From: mass.
oil at 50k?
just picked up my 01 250 5.4 superduty. i forget to ask the guy i bought it what weight he was running etc... i ran 10/30 in my 4.6 no problems. what do you 5.4 experts recommend??
 
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Old Mar 5, 2008 | 01:07 PM
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anfo's Avatar
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5/20 full syn.
 
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Old Mar 5, 2008 | 01:11 PM
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5-20 of your chosing.

I have 54k on my 5.4 with Napa/Valvoline dino, with no plans to switch. I do change at about 3k, usually closer to 4k.
 
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Old Mar 5, 2008 | 01:27 PM
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ok cool. i always feared switching over to synthetic for fear of leaks developing. 50k isnt really that many miles so..shouldnt be a problem right???
 
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Old Mar 5, 2008 | 01:30 PM
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Synthetics are the way to go. Thats all I use in all of my vehicles, easier startups, better mileage, also you can go longer between oil changes. Never had leaks because of synthetic oil.
 
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Old Mar 5, 2008 | 01:37 PM
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Originally Posted by keith97xlt
ok cool. i always feared switching over to synthetic for fear of leaks developing. 50k isnt really that many miles so..shouldnt be a problem right???
I switched the oil in my '91 5.8L to synthetic at 87k, it has 114k on it now and no problems.
 
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Old Mar 5, 2008 | 02:06 PM
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Originally Posted by keith97xlt
ok cool. i always feared switching over to synthetic for fear of leaks developing. 50k isnt really that many miles so..shouldnt be a problem right???
Old wives tale. Nothing will leak that isn't leaking already.
 
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Old Mar 5, 2008 | 02:40 PM
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ok great. the votes are in. synthetic it is.
 
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Old Mar 6, 2008 | 01:18 AM
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Originally Posted by keith97xlt
ok cool. i always feared switching over to synthetic for fear of leaks developing. 50k isnt really that many miles so..shouldnt be a problem right???


I switched over to synthetics on a used 5.0 w/ 200,000 miles - no problem.
 
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