Let's start over......
Senior Member
Joined: Jan 2009
Posts: 10,730
Likes: 42
From: Concord, NC
Nor would I, however there are tons and tons of posts all over the web about 5.4 3V's in trucks and SUVs making the noise mine was. Ford even said in a TSB to put in 10-40 to see if it goes away. That's too extreme to me, but after doing some researching and reading all sorts of people putting tons of mileage on the 5w-30, I'm not worried.
Senior Member
Joined: Nov 2007
Posts: 1,845
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From: In a house, in a small town
The trucks at a different dealer than I usually take it to and I about had a panic attack this morning at the thought of the dealer flashing the PCM with my high HP tune in it.
Technical Article Contributor
Joined: Apr 2009
Posts: 10,697
Likes: 14
From: In the fast lane from LA to Tokyo...
Decided to change oil to 5w-30 (same MC synthetic blend)... been having an intermittent tapping. So far so good... I thought I was crazy yesterday when it was so quiet but on the way to work... no engine noise. Just the faint injector ticking. Sounds like a new truck. I hope it continues.
Last edited by 88racing; Aug 18, 2014 at 11:13 AM.
Senior Member
Joined: Feb 2007
Posts: 4,535
Likes: 28
From: Lockport, La.
Decided to change oil to 5w-30 (same MC synthetic blend)... been having an intermittent tapping. So far so good... I thought I was crazy yesterday when it was so quiet but on the way to work... no engine noise. Just the faint injector ticking. Sounds like a new truck. I hope it continues.
Senior Member
Joined: Jan 2009
Posts: 10,730
Likes: 42
From: Concord, NC
After 70K miles on the 3V 5.4's I don't think going to a 5W30 would hurt..especially during the hot summer's. I ran the 5W20 MC Syn Blend untill 50K miles and then switched to Mobil One 5W20 untill I had 100K miles when I sold the truck. Never had any problems with that 5.4 in the '04 Lariat I had. Ford told me the new close tolerance engines needed the 5W20. Glad your engine is running better!
Senior Member
Joined: Sep 2008
Posts: 3,480
Likes: 6
From: San Angelo, TX
Was looking on LET's website and a bone stock Eb with tune only dyno'd at 379hp 451tq..
Another Eb with DP's, I/C, intake, meth, fuel pump, E40 and LET tune dyno'd at 452HP 531TQ.
I think it may be time to put some parts on the ol Eb
