View Poll Results: Specifically for the 2004-2008 5.4L V8 Triton, what oil do YOU use?

0W-40

1.06%

5W-20

474

55.76%

5W-30

289

34.00%

5W-40

2.12%

10W-30

3.88%

10W-40

1.53%

Any of them, it doesn't matter

0.59%

Other

1.06%

Voters: 850. You may not vote on this poll

5.4L Engine Oil - "What Should I Use?"

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07-14-2016, 07:19 AM

#71

dyeguy1212

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Quote:

Originally Posted by Summers22

I have a good friend who is ASE certified. He told me to NEVER run full synthetic on high mile 5.4. He tried it on his and it leaked horribly and has seen 3 others do the same.

I run full synthetic on mine, 215k miles and counting. No issues.

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The following 3 users liked this post by dyeguy1212:

4.6owner (07-14-2016), o6S1D9e (11-23-2021), Redbone43 (06-04-2021)

07-14-2016, 01:38 PM

#72

4.6owner

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Quote:

Originally Posted by dyeguy1212

I run full synthetic on mine, 215k miles and counting. No issues.

I have the same experience, Mine has 155K on the clock and it is dry as can be everywhere. I don't think any oil is a fix for a mechanical or physical problem regardless of weight or type.

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07-14-2016, 02:10 PM

#73

TOPGLOCK

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Quote:

Originally Posted by 4.6owner

I have the same experience, Mine has 155K on the clock and it is dry as can be everywhere. I don't think any oil is a fix for a mechanical or physical problem regardless of weight or type.

Do you pull with you're truck? Full synthetic was fine in my truck to until I pulled our 6k TT.

Like I posted above it still mystifying why mine seeps out of the valve cover. I switch back with no more leaking. Complete mystery

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07-14-2016, 02:10 PM

#74

Martian

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Quote:

Originally Posted by TOPGLOCK

I pulled a 20' trailer with a 2006 Fusion loaded onto it from Virginia Beach up into the mountains of PA, then that same trailer with lawnmowers and other stuff on it back down to VB with no issues.

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07-14-2016, 02:12 PM

#75

4.6owner

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Yes. I tow regularly. Never had an issue. Perhaps climate plays a role? IDK but it is pretty sunny and hot here year round in southern california. I am thinking the heat cycling of seals getting frozen then hot and back again may contribute to it whereas here it is consistent in terms of temps.

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07-14-2016, 02:14 PM

#76

TOPGLOCK

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Quote:

Originally Posted by Martian

I pulled a 20' trailer with a 2006 Fusion loaded onto it from Virginia Beach up into the mountains of PA, then that same trailer with lawnmowers and other stuff on it back down to VB with no issues.

I guess I can conclude my 5.4 doesn't like full synthetic...

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07-14-2016, 02:15 PM

#77

Martian

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That is pretty weird.

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07-18-2016, 11:24 AM

#78

linemanfx4

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Location: Mechanicsville, VA

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I have only used 5W-20 Motocraft synthetic blend in my 2004. I have 95000 miles on it with no problems. Still has the original plugs. Not looking forward to changing them after hearing all the horror stories of them breaking off.