5w40 synthetic oil in 4.6 l ?? - Page 2 - Mustang Evolution

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Old 12-29-2015, 04:01 PM   #36
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i was invited this past year to have my car at a local ford dealership on display at a customer appreciation lunch.you should've seen the looks on the faces of the mc reps when they walked over to the car wanting to talk about motorcraft with the people looking at the car and then being told that nothing on the motor,brakes or suspension were motorcraft.that sir was pay back enough.the parts manager at this dealership talked to a rep at the time of the failure and they shut the door on him too.he's the one that invited me this last year after seeing what i had done to the car and kinda wanting to rub it in thier faces also.i've already been invited back for next year too.lol!
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Old 12-29-2015, 04:11 PM   #37
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wow, I know how you feel. they will never admit any kind of fought. I had the mobil one and fram reps all fired up neither of them would talk about it. I did find some info on "Bob's the oil guy" forum and some TBN anyalist testing on Mobil one and it was not to good. They push Penzoil based on the testing's they have on file and the Mobil one and Valvoline were the worst.
I've been on that forum too. Maybe some push Pennzoil but all independent tests show M1 is an extremely good oil although it is not fully synthetic unless you buy the extended performance stuff. Which is $27 for a 5 quart jug at wal mart which is where I ALWAYS get my oil since they have T6 for $20/gal as well. I go there and get my oil and then stop at Napa on the way home for filters.

Mobil 1 extended for normal use, T6 for heavy duty/diesel or engines with slight oil burn and then Amsoil if you want the absolute overkill best. Wix or Amsoil filter. Done. Ppl stress way too Damn much over oil tho. Any oil sold has to meet a minimum standard, it's the filter that is way more important honestly.

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Old 12-29-2015, 04:15 PM   #38
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Ouch, I've only used motorcraft oil and filters in all my Ford's for 30 years, zero issues. Plugs too, to each his own

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Old 12-29-2015, 04:30 PM   #39
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Who opened this can worms! I can't remember! Lol!
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Old 12-29-2015, 10:30 PM   #40
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really good info, but has anyone ran this 5w40 castrol or penzoil though?
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Old 12-30-2015, 06:51 AM   #41
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really good info, but has anyone ran this 5w40 castrol or penzoil though?
It'll act the same as the stuff I'm running really. 5w means its fine for cold winter starts and once it gets warm a 40 weight oil is totally fine. Might even cure a few leaks like it did on my cars. Seeping cam seal on my wife's and my truck liked to make a quart of oil disappear every 5k miles before I switched.
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Old 12-31-2015, 05:23 PM   #42
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5w40 Rotella?

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Originally Posted by scottydsntknow View Post
It'll act the same as the stuff I'm running really. 5w means its fine for cold winter starts and once it gets warm a 40 weight oil is totally fine. Might even cure a few leaks like it did on my cars. Seeping cam seal on my wife's and my truck liked to make a quart of oil disappear every 5k miles before I switched.
Have you heard anyone running it with a 5.4 motor with over 300k miles? I tryed a different brand diesel synthetic and it would leak really bad were the other 10w40 would not.
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Old 12-31-2015, 05:58 PM   #43
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I dunno but if it starts eating oil again I'll go to a 10w 40 dino

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Old 01-01-2016, 05:19 PM   #44
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oil filters

I noticed one thing not mentioned was that when we change oil filters, we have to make sure the old seal isn't stuck on the face of the oil filter bracket. if you have a double seal on the oil filter they have been known to blow out when under pressure because of the thickness of the double seal which is rubber or some other gasket material. just a thought.
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