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Old Oct 24, 2006 | 10:40 PM
  #1  
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From: Mo
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What is the best 10w30 castrol or valvoline for my 99 5.4 F150?
 
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Old Oct 25, 2006 | 08:21 AM
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Why such a thick weight? These engines were spec'd for 5w20. Given the two options though I would go with Castrol, but only cause I like their bottles. Truth be told, there would be no difference, one is not better than the other.
 
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Old Oct 25, 2006 | 12:47 PM
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From: Mo
Mine calls for 5w30 it has 112000 10w30 might be better with 112000 mi.
 
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Old Oct 25, 2006 | 05:10 PM
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5W30 is great for the motors. 5W20 is spec for the new motors. anything over 10w30 might be getting a little too thick for this design of motor. still work, but not the best idea. Any good brand of oil meeting the new spec is fine. Pensoil, Quaker State, Valvoline, dont make a difference.
 
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Old Oct 25, 2006 | 06:22 PM
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From: Mo
Mine is not new its a 99 F150 5.4 4x4 off road
 
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Old Jan 2, 2007 | 07:28 AM
  #6  
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From: Central NY
2001 F150 Screw with 5.4L. We all know she's spec'd for 5W-20, but she has 92k miles....
would you run:

MC 5W20
MC 5W30
Penzoil Platinum full sythetic 5W-20 or 5W30
Quaker State Q Torqe 4x4 truck full synthetic 5W-20 or 5W30

Yes, it's an age old question..thanks.
 
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Old Jan 2, 2007 | 07:45 AM
  #7  
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From: Southern Louisiana
Originally Posted by rsylvstr
2001 F150 Screw with 5.4L. We all know she's spec'd for 5W-20, but she has 92k miles....
would you run:

MC 5W20
MC 5W30
Penzoil Platinum full sythetic 5W-20 or 5W30
Quaker State Q Torqe 4x4 truck full synthetic 5W-20 or 5W30

Yes, it's an age old question..thanks.
I would and do run MC 5w30 with an MC 820s filter. Cant go wrong with that combo
 
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Old Jan 2, 2007 | 07:56 AM
  #8  
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From: Central NY
wait wait, one more

<?xml:namespace prefix = o ns = "urn:schemas-microsoft-comfficeffice" /><o></o>

OR MY OLD FAV: Castrol conventional 5W30<o></o>

<o></o>

Most importantly, IMHO, since she’s “old” should I be running the 5W-30 instead of 20???<o></o>

<o></o>
 
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