Which Viscosity
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New User
Joined: Oct 2016
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From: Mount Vernon, TX
Which Viscosity
Ii have a 2000 f150 5.4 2v. My question is which oil viscosity should I run since it seems all manufactures have gone to 5w20 or 0w20?
My old girl's book says 10w30. What do you run in your older 5.4?
If there are any Ford power train guys out there please advise.
Louis
My old girl's book says 10w30. What do you run in your older 5.4?
If there are any Ford power train guys out there please advise.
Louis
Fleet Mechanic
Joined: Aug 2008
Posts: 1,446
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From: NE Iowa JD Country
Hotshot
Joined: Jul 2005
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tlbond........ you are in Texas.. It is a lot higher ambient temp than in Iowa or Minnesota. A slightly thicher oil in Texas like 10w30 would act a lot like 5w20 in Minnesota. If you have been using 10w30 and its working good, I would stick with that. 5W20 is going to give you a lower oil pressure with a hot motor.
Tuned
Joined: Apr 2013
Posts: 354
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From: Katy, Republic of Texas
5w-20 is what I use.
People a lot smarter than me and know a whole lot more about lubrication and engine design say use 5w-20, and millions of miles have been driven on 5w-20, so that is what I use.
People a lot smarter than me and know a whole lot more about lubrication and engine design say use 5w-20, and millions of miles have been driven on 5w-20, so that is what I use.
Tuned
Joined: Apr 2013
Posts: 354
Likes: 5
From: Katy, Republic of Texas
The spec was changed for the 2001 model year I believe, it was back spec'ed to previous models that previously were 5w-30.
Some say it is CAFE only reasons, but there were issues with the timing chain tensioner with thicker oil, and 5w-20 helps with that.
Some say it is CAFE only reasons, but there were issues with the timing chain tensioner with thicker oil, and 5w-20 helps with that.
Fleet Mechanic
Joined: Sep 2003
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Check that manual again... The 5th printing of the 2000 manual says 5w-20
My 1997, the first year of the modular engines in the F-150, is 5w-30. I don't think 10w-30 was ever spec'd for the modular engines, not even the 4.6L, which started out in cars in the early 1990's. They spec'd 5w-30 for many years on those, not 10w-30.
My 1997, the first year of the modular engines in the F-150, is 5w-30. I don't think 10w-30 was ever spec'd for the modular engines, not even the 4.6L, which started out in cars in the early 1990's. They spec'd 5w-30 for many years on those, not 10w-30.
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1st Gear
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if you have a high mileage engine use 0w30 casteroil edge best ive seen by far
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