5.0L (1979-1995) Mustang Technical discussions on 5.0 Liter Mustangs within. This does not include the 5.0 from the 2011 Mustang GT. That information is in the 2005-1011 section.

Oil ques....

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Old Apr 22, 2006 | 07:26 PM
  #1  
91LXStang2727's Avatar
91LXStang2727
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Default Oil ques....

Is it ok to go from regular oil to synthetic?
Old Apr 22, 2006 | 07:31 PM
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Default RE: Oil ques....

Yup. The only time you shouldn't use synthetic is during initial break-in.
Old Apr 22, 2006 | 07:35 PM
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Default RE: Oil ques....

wont synthetic oil bleed from old seals?
Old Apr 22, 2006 | 08:09 PM
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Default RE: Oil ques....

Just use the regular, synthetic will bring out all those unknown leaks.
Old Apr 22, 2006 | 08:22 PM
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Default RE: Oil ques....

^^^^^^^^^ yes thats true
Old Apr 22, 2006 | 08:35 PM
  #6  
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Default RE: Oil ques....

but isnt synthetic bettr for engine?
Old Apr 22, 2006 | 08:52 PM
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Default RE: Oil ques....

its not as thick as conventional oil
Old Apr 22, 2006 | 08:54 PM
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Default RE: Oil ques....

ORIGINAL: 91LXStang2727

but isnt synthetic bettr for engine?
Not necessarily
Old Apr 23, 2006 | 08:14 PM
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ORIGINAL: Black Snake

Just use the regular, synthetic will bring out all those unknown leaks.
True, but all things being equal, there's no reason not to run synthetic.
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