Mobil 1 0w40 in my 5.4

Pennzoil motor oil
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Originally Posted By: dparm
Except that Mobil 1 Advanced Fuel Economy 0w30 is a true 0w30 with HTHS of 3.0.


But Mobil 1 0w40 has a lot better adpak for wear resistance than Mobil 1 Advanced Fuel Economy. All in all, I think it's a good choice, even though I don't normally recommend going up more than one grade, if at all. The 0w40 is at the low end of 40-weights, and will be a 30-weight in about 1000 miles of driving anyway.

Or he could make a "Caterham Cocktail" of Mobil 1 0w40 and Toyota 0w20 to get a high-VI 0w30 that has a better adpak than Mobil 1 0w30.
 
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Originally Posted By: thorromig
My buddy runs straight 30 weight Pennzoil in his 01 5.4 due to starting chatter & towing. Protection or 2% fuel benefits?? You decide!!!


Most 'modern' straight weights, due to the quality of modern base oils, are actually multi-visc. oils in disguise.

His SAE 30 is probably really a 15w30.
 
Originally Posted By: 2010_FX4
Originally Posted By: dparm
Originally Posted By: racin4ds
Well, I did it. I know its not the "ideal" oil for this engine but I hear nothing but good things about it and it was on sale!

My truck is an 01 with 200k miles on the 5.4, it doesn't leak or burn a drop of oil and runs excellent. I know ford likes the 5w20 in these engines but we tow a horse trailer all summer and I wanted a lil something "extra" in the sump when shes workin hard... I really like the idea of a 0W when starting up since these motors are notorious for rattling, and those overhead cams need oil quick, and once its hot and working hard I have the 40w in there for more shear stability.

What do the experts think? Will it hurt anything?

What makes you think the 0w40 is more shear-stable? And what makes you think you need something with added shear stability? Is that motor notorious for destroying oil?

I run 5W-20 pulling heavy loads in (usually) 100+ heat and have no problems with it; most xW-40 oil shear down to high 20s/low 30s anyway, so is there something to gain by using 40W? Doubtful. The "rattling" can be caused by an ADBV problem with certain filters, but good questions might be--is the OPs motor rattling at start up? Is the current oil shearing? If not, then why the "preventative medicine"?


FWIW, it does NOT shear in a 5.4L, I have done used oil analysis on it.
 
Originally Posted By: 2010_FX4
Originally Posted By: arob85
I do not think ford recommends 5w-20 in the older 2 valve 5.4s. I have a 2000 f150 with 5.4 and the owners manual has 5w30. Mobil 1 0w40 is known to shear to a 30 anyhow and that's the oil I plan on running once I'm out of the Quaker State 5w40 I'm running now. I ran Mobil 1 5w30 for about 50K miles before that and I cannot tell any difference.

In North America, the original 2V [non-variable camshaft timing (VCT)] engines had 5w30 specified for them and of these only from 1997-1999. Starting in 2000, the 2V versions were specified to use 5W-20 as the oil of choice. However, ALL 3V (VCT) versions of the 4.6L/5.4L engines had 5W-20 as the specified oil from the onset.


They spec'd 5w30 right up to sometime well into 2000. My parent's 2000 Expedition still spec's 5w30.
 
Originally Posted By: OVERK1LL
Originally Posted By: 2010_FX4
Originally Posted By: arob85
I do not think ford recommends 5w-20 in the older 2 valve 5.4s. I have a 2000 f150 with 5.4 and the owners manual has 5w30. Mobil 1 0w40 is known to shear to a 30 anyhow and that's the oil I plan on running once I'm out of the Quaker State 5w40 I'm running now. I ran Mobil 1 5w30 for about 50K miles before that and I cannot tell any difference.

In North America, the original 2V [non-variable camshaft timing (VCT)] engines had 5w30 specified for them and of these only from 1997-1999. Starting in 2000, the 2V versions were specified to use 5W-20 as the oil of choice. However, ALL 3V (VCT) versions of the 4.6L/5.4L engines had 5W-20 as the specified oil from the onset.


They spec'd 5w30 right up to sometime well into 2000. My parent's 2000 Expedition still spec's 5w30.

Could be the year run of engines (the 2000 MY vehicles probably had 1999 engines; i.e. 2000 MY comes out in September of 1999 and thus the vehicles/engines are built in 1999). I would hazard to guess that all 2001 MY vehicles had 5W-20 in them and on the oil cap of the engine. It would not hurt either way since the 2V engines were originally specified for 5w30, in contrast the 3V's were all 5W-20.
 
Originally Posted By: ARCOgraphite
Never increase "protection" with ILSAC oils or "synthetic' - just the opposite. Protection is a vague term - just like mobil's schpeel. Regardless, a good ACEA A3,B4-10 GM LL, BMW LL01, MB229.3 rated lube will whip any ILSAC GF-5 buttocks where required.


This COMPLETELY contradicts your earlier statement telling him to run some random variant of "defy", which doesn't carry the spec's you just mentioned.

Mobil 1 0w40 has more high performance certs than any other oil on the market, ultimately the use of the term "protection" here is far from vague, as the oil in question arguably provides the best protection of any readily available PCMO lubricant and this is VERIFIABLE because of the testing the lubricant had to go through to get the certifications it has.
 
Originally Posted By: 2010_FX4
Originally Posted By: OVERK1LL
Originally Posted By: 2010_FX4
Originally Posted By: arob85
I do not think ford recommends 5w-20 in the older 2 valve 5.4s. I have a 2000 f150 with 5.4 and the owners manual has 5w30. Mobil 1 0w40 is known to shear to a 30 anyhow and that's the oil I plan on running once I'm out of the Quaker State 5w40 I'm running now. I ran Mobil 1 5w30 for about 50K miles before that and I cannot tell any difference.

In North America, the original 2V [non-variable camshaft timing (VCT)] engines had 5w30 specified for them and of these only from 1997-1999. Starting in 2000, the 2V versions were specified to use 5W-20 as the oil of choice. However, ALL 3V (VCT) versions of the 4.6L/5.4L engines had 5W-20 as the specified oil from the onset.


They spec'd 5w30 right up to sometime well into 2000. My parent's 2000 Expedition still spec's 5w30.

Could be the year run of engines (the 2000 MY vehicles probably had 1999 engines; i.e. 2000 MY comes out in September of 1999 and thus the vehicles/engines are built in 1999). I would hazard to guess that all 2001 MY vehicles had 5W-20 in them and on the oil cap of the engine. It would not hurt either way since the 2V engines were originally specified for 5w30, in contrast the 3V's were all 5W-20.


Quite likely you are right.

The 2V engines were originally 10w30 and then 5w30 spec'd. They were never designed around 5w20 like the later 3V, which received an upgraded oil pump and other goodies to go along with it.
 
Mkay, I will take both thank you. And no way it's going to be 2%.

So that straight weight oil protects better for towing, eh?


Originally Posted By: thorromig
My buddy runs straight 30 weight Pennzoil in his 01 5.4 due to starting chatter & towing. Protection or 2% fuel benefits?? You decide!!!
 
Originally Posted By: aquariuscsm
There`s also a TSB telling Ford owners to bump up to a 10W40 if they`re experiencing engine noise with the 5W20 (not sure if it`s engine specific).

The Mobil 1 0W40 won`t hurt a thing. If anything,it`ll give you better protection.


It's because of of a loud cam phaser. All the 40 wt oil does is mask the problem. 50 wt might mask it even more.
 
Originally Posted By: thorromig
My buddy runs straight 30 weight Pennzoil in his 01 5.4 due to starting chatter & towing. Protection or 2% fuel benefits?? You decide!!!



LOL!!! Extra protection! You have me on that one! If anything he is causing more wear at start up where most of engine wear happens. Like I said on my first response it is the OP's truck I would not do but he paid for his oil and his truck use whatever.
 
Originally Posted By: OVERK1LL
FWIW, it does NOT shear in a 5.4L, I have done used oil analysis on it.

I know; I have a used oil analysis on every single OC in my FX4 and that was my point. The OP seems to be applying a "cure" where there is no disease.
 
Originally Posted By: 2010_FX4
Originally Posted By: OVERK1LL
FWIW, it does NOT shear in a 5.4L, I have done used oil analysis on it.

I know; I have a used oil analysis on every single OC in my FX4 and that was my point. The OP seems to be applying a "cure" where there is no disease.


Gotcha. I just thought it was funny that everybody mentions how much Mobil 1 0w40 shears, where in the modular, it certainly doesn't.
 
Mobil 1 0w40 is a fine oil, and should work fine in this application. I have been running 5w40 in my V10 Modular for the last year. It has nearly eliminated the oil consumption, and it handled the subzero starts this winter very well.
 
Originally Posted By: OVERK1LL
Originally Posted By: ARCOgraphite
Never increase "protection" with ILSAC oils or "synthetic' - just the opposite. Protection is a vague term - just like mobil's schpeel. Regardless, a good ACEA A3,B4-10 GM LL, BMW LL01, MB229.3 rated lube will whip any ILSAC GF-5 buttocks where required.


This COMPLETELY contradicts your earlier statement telling him to run some random variant of "defy", which doesn't carry the spec's you just mentioned.

Mobil 1 0w40 has more high performance certs than any other oil on the market, ultimately the use of the term "protection" here is far from vague, as the oil in question arguably provides the best protection of any readily available PCMO lubricant and this is VERIFIABLE because of the testing the lubricant had to go through to get the certifications it has.
Not really. I mentioned an non ILSAC oil which Defy is. The lack of certs make this product an unknown, but looking at the PDS it sports a higher HTHS + increased ZDP which in practice SHOULD improve boundary lube and add a small margin of overstress safety. Agreed, its better to pick an oil that has a good approval list but 5w30 ACEA A3 oil are rare. I T appears the 40 grade may be a step to far when maybe a "baby step would make do.
 
Last edited:
Originally Posted By: ARCOgraphite
Originally Posted By: OVERK1LL
Originally Posted By: ARCOgraphite
Never increase "protection" with ILSAC oils or "synthetic' - just the opposite. Protection is a vague term - just like mobil's schpeel. Regardless, a good ACEA A3,B4-10 GM LL, BMW LL01, MB229.3 rated lube will whip any ILSAC GF-5 buttocks where required.


This COMPLETELY contradicts your earlier statement telling him to run some random variant of "defy", which doesn't carry the spec's you just mentioned.

Mobil 1 0w40 has more high performance certs than any other oil on the market, ultimately the use of the term "protection" here is far from vague, as the oil in question arguably provides the best protection of any readily available PCMO lubricant and this is VERIFIABLE because of the testing the lubricant had to go through to get the certifications it has.
Not really. I mentioned an non ILSAC oil which Defy is. The lack of certs make this product an unknown, but looking at the PDS it sports a higher HTHS + increased ZDP which in practice SHOULD improve boundary lube and add a small margin of overstress safety. Agreed, its better to pick an oil that has a good approval list but 5w30 ACEA A3 oil are rare. I T appears the 40 grade may be a step to far when maybe a "baby step would make do.


Having used Mobil 1 0w40 for quite a while in the application in question, I can state with a great deal of confidence that it works quite well.

Other options would be GC or BMW 5w30, but both of those are almost as heavy as Mobil 1 0w40 so you are at that point splitting hairs.
 
Originally Posted By: tig1
Originally Posted By: aquariuscsm
There`s also a TSB telling Ford owners to bump up to a 10W40 if they`re experiencing engine noise with the 5W20 (not sure if it`s engine specific).

The Mobil 1 0W40 won`t hurt a thing. If anything,it`ll give you better protection.


It's because of of a loud cam phaser. All the 40 wt oil does is mask the problem. 50 wt might mask it even more.


+1. On start up yuo can hear the tensioning as the oil pressure is felt.
 
When my 1997 5.4 F150 was new it had a 3/36 warranty which it received 5W30 SH-SJ oil at the dealership during this period. From there I went to 10W30 (not knowing any better) until 90,000 miles. From there on out it has either had Mobil 1 0W40 or Rotella T Synthetic 5w40 with two OCI's of JD 0W40. The truck now has 294,000 miles and consumes about 1qt every 6000 miles. OCI's are between 7-10K miles. Last year when it had 280,000 miles, I pulled a 6000 lb boat and trailer from Ohio to Lake Havisu in some sweltering heat up some steep hills with no issues. The 6 used oil analysis have all been fine. My first UOA was at 100,000 miles. No science, just my experience.
 
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