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Joined: Jun 2005
Posts: 99
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Posts: 99 |
Well my 3L build is coming to the end as of this July and hope to have it in by July 31. Now on with the oil! I have a 99 Cougar which was included in that TSB about changing to 5W-20 but since I bought the car almost two years ago I have been running 5W-30 Mobil 1 Fully Synthetic with either a K&N or Motorcraft filter.
Now with the 3L, I�m using the 3L short block (of course, 02 Sable) with also the 3L heads. I got the heads PnP and split ported by Kinger.
Now what oil weight should I run? And what weight are guy fellow 3L guys running? Thanks for all the help.
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Joined: May 2000
Posts: 1,336
Hard-core CEG\'er
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Joined: Oct 2000
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Hard-core CEG'er
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Hard-core CEG'er
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the 5w20 change was purely for fuel efficency reasons. Its really a personal preference. With that said, I ran 5w20 in my 00 Lightning and did oil samples on it and everything was awesome internally. In my 3.0L hybrid though I run Mobil Syn 5w30.
Ryan
Trollin!
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Joined: May 2000
Posts: 1,336
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Originally posted by RTStabler51:
the 5w20 change was purely for fuel efficency reasons. Its really a personal preference. With that said, I ran 5w20 in my 00 Lightning and did oil samples on it and everything was awesome internally. In my 3.0L hybrid though I run Mobil Syn 5w30.
Beat you to it 
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Joined: Sep 2000
Posts: 3,223
"Absolut Rara."
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"Absolut Rara."
Joined: Sep 2000
Posts: 3,223 |
the clearances in Ford Duratecs, and modular V8s is not designed for 5w20, they are all designed for 5w30.
5w20 in those engines show a noticable increase in wear, and decrease in overall life on extensive Ford dyno testing.
5w20 is acceptable, but is absolutely only recommended for Ford engines in order to increase CAFE averages. 5w30 is significantly better for the overall health of the Duratec.
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Joined: Aug 2004
Posts: 1,609
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1998.5 SVT contour #5979 3L 
1995 Mercury Mystique 2.5L auto, all ghetto fo sho
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Joined: May 2000
Posts: 1,336
Hard-core CEG\'er
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Hard-core CEG\'er
Joined: May 2000
Posts: 1,336 |
Originally posted by Rara:
the clearances in Ford Duratecs, and modular V8s is not designed for 5w20, they are all designed for 5w30.
5w20 in those engines show a noticable increase in wear, and decrease in overall life on extensive Ford dyno testing.
5w20 is acceptable, but is absolutely only recommended for Ford engines in order to increase CAFE averages. 5w30 is significantly better for the overall health of the Duratec.
Thank you for getting my back 
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Joined: Jan 2005
Posts: 316
CEG\'er
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CEG\'er
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Originally posted by Rara:
the clearances in Ford Duratecs, and modular V8s is not designed for 5w20, they are all designed for 5w30.
5w20 in those engines show a noticable increase in wear, and decrease in overall life on extensive Ford dyno testing.
5w20 is acceptable, but is absolutely only recommended for Ford engines in order to increase CAFE averages. 5w30 is significantly better for the overall health of the Duratec.
Ah, very cool info! Got a link to that study? I'd like to read that. Was it on the motorcraft oil?
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