I am torn.

[OVERKILL]

Originally Posted By: RISUPERCREWMAN
Why anybody would want to put in 5w-40 in a modern Ford Modular V-8 engine in beyond belief! Do what the manual calls for 5w-20, & stop stressing about it! My 07 5.4 3v has been weined on Mobil 1 5w-20 since it's 1st oil change, & runs super smooth at 36,000 miles!......


Why?

The engine was originally spec'd for 5w30. The Mobil 1 Turbo Diesel Truck is a better oil. Yes, it is heavier, but the truck doesn't seem to mind, as fuel mileage has not been affected.

I could run OEM filters as well (just finished an OCI with a similar combo to yours: Mobil 1 5w20, Motorcraft filter) but I feel both products I am currently using are BETTER than what is spec'd by Ford.

-The filter in terms of filter media
-The oil in terms of overall protection

This site is all about the experimentation and obsession with oil. If we all just followed what was in the manual and on the fill cap, we'd have nothing to talk about.

 

[Gary Allan]

(try and imagine the look on Obiwan's face as he says to Luke, "you need to go with us to Alderan if you're going to learn the ways of THE FORCE")

You need to go lighter if you really want to experiment with oils

 

[OVERKILL]

Originally Posted By: Gary Allan
(try and imagine the look on Obiwan's face as he says to Luke, "you need to go with us to Alderan if you're going to learn the ways of THE FORCE")

You need to go lighter if you really want to experiment with oils

I already committed heresy in that regard; I ran 0w20 in my '87 Mustang

And it didn't blow up, and made winter starting a breeze

My OPINION is, based on Doug's extensive testing, that Delvac 1/Mobil 1 Turbo Diesel Truck CI-4+ is a superior oil.

Though Gary, I do find your 10-weight experiment with your Jeep quite fascinating as well.

 

[Nickdfresh]

You know, you could have used Mobil 1 Truck and SUV 5w30...

 

[OVERKILL]

Originally Posted By: Nickdfresh
You know, you could have used Mobil 1 Truck and SUV 5w30...


Not as robust as the Mobil 1 Turbo Diesel Truck, nor do we have the same volume of knowledge (Doug Hillary) at our disposal in regards to its performance.

 

[Nickdfresh]

"Robust" as in how? It's thicker? The 5w30 has a very low pour point of -54C (-65F), I think that is a very robust synthetic oil that is almost all PAO and with a good add pack...

 

[OVERKILL]

Originally Posted By: Nickdfresh
"Robust" as in how? It's thicker? The 5w30 has a very low pour point of -54C (-65F), I think that is a very robust synthetic oil that is almost all PAO and with a good add pack...


Robust as in it went several million Km's with extended drains in an entire fleet of trucks with internal components that spec'd out to "as new" upon tear-down inspection at the 1.2 Million K mark.

 

[Nickdfresh]

On over the road diesels...

 

[KDS]

I wouldn't run a 40 in a Mod motor unless the car was seeing heavy track use or it was very hot for most of the year.

Mod motors were designed around 30 weight oils, the 20 is just to meet CAFE. I run 30 as my car sees the track from time to time. but you can run 20 for over 200,000 miles and never have a problem.

THe GT/GT500 use a 50 because it was designed to run on a 50.

 

[OVERKILL]

Originally Posted By: KDS
I would never run a 40 in a Mod motor unless the car was seeing heavy track use or it was very hot for most of the year.

Mod motors were designed around 30 weight oils, the 20 is just to meet CAFE. I run 30 as my car sees the track form time to time. but you can run 20 for over 200,000 miles and never have a problem.

THe GT/GT500 use a 50 because it was designed to run on a 50.


So you know for a FACT that the clearances for the bearings in the bottom-end of the GT500 differ from those in the regular GT then?

Or is this speculation.

15w40/5w40 is a spec'd grade for the Modulars in Australia.

And I only plan on running 5w40 for the hot summer, will likely switch to the 0w40 for the winter.

 

[OVERKILL]

Originally Posted By: Nickdfresh
On over the road diesels...


Yes, as that is the primary market of this oil.

I somehow doubt Exxon-Mobil is going to approach him and ask him to run Delvac 1 in a fleet of Crown Vic's.....

 

[KDS]

Originally Posted By: OVERK1LL
Originally Posted By: KDS
I would never run a 40 in a Mod motor unless the car was seeing heavy track use or it was very hot for most of the year.

Mod motors were designed around 30 weight oils, the 20 is just to meet CAFE. I run 30 as my car sees the track form time to time. but you can run 20 for over 200,000 miles and never have a problem.

THe GT/GT500 use a 50 because it was designed to run on a 50.


So you know for a FACT that the clearances for the bearings in the bottom-end of the GT500 differ from those in the regular GT then?

Or is this speculation.


No, but I know that different block, rods, pistons, heads, oil pump. But what does that matter? Your looking to run it in a 5.4 SOHC not a GT motor. I have even seen a Ford engineer say that he would never use 20 in his track driven car as that 40 is as high as he would go, and this is a tech that worked on the 05+ GT engine design.

 

[Nickdfresh]

Originally Posted By: OVERK1LL
Originally Posted By: Nickdfresh
On over the road diesels...


Yes, as that is the primary market of this oil.

I somehow doubt Exxon-Mobil is going to approach him and ask him to run Delvac 1 in a fleet of Crown Vic's.....


Since when does summer "get hot" in Ontario?

 

[OVERKILL]

Originally Posted By: Nickdfresh
Originally Posted By: OVERK1LL
Originally Posted By: Nickdfresh
On over the road diesels...


Yes, as that is the primary market of this oil.

I somehow doubt Exxon-Mobil is going to approach him and ask him to run Delvac 1 in a fleet of Crown Vic's.....


Since when does summer "get hot" in Ontario?

Hey now, I consider 25+C "hot"

 

[moribundman]

Originally Posted By: OVERK1LL
I am torn.


I thought you might say, "I am Torn, Rip Torn."

 

[OVERKILL]

Originally Posted By: KDS
Originally Posted By: OVERK1LL
Originally Posted By: KDS
I would never run a 40 in a Mod motor unless the car was seeing heavy track use or it was very hot for most of the year.

Mod motors were designed around 30 weight oils, the 20 is just to meet CAFE. I run 30 as my car sees the track form time to time. but you can run 20 for over 200,000 miles and never have a problem.

THe GT/GT500 use a 50 because it was designed to run on a 50.


So you know for a FACT that the clearances for the bearings in the bottom-end of the GT500 differ from those in the regular GT then?

Or is this speculation.


No, but I know that different block, rods, pistons, heads, oil pump. But what does that matter? Your looking to run it in a 5.4 SOHC not a GT motor. I have even seen a Ford engineer say that he would never use 20 in his track driven car as that 40 is as high as he would go, and this is a tech that worked on the 05+ GT engine design.


Yes, but the Modular engines share much across the board, and that includes bearing clearances on at least MOST of them.

The block (5.4L iron) is the same as my truck. And likely, the clearances for the bearings are the same.

And I agree with the Ford Engineer completely. 20 is likely too thin for a track-duty car, and I would think that with the exploding oil filter fiasco that the heaviest I would go is a 40-weight as well.

Now, this isn't a track car, but it's a 6,000+lb SUV that gets driven hard; and so I want the most protection. This truck and a track-driven modular share the same size sump, and me flogging the truck on passes, up hills and generally hard driving is not a whole lot different than tracking my Mustang, which will get the same oil.

It's a synthetic 5w40, not 20w50 or 15w40, both of which are thicker cold. And for the winter, the 0w40 is close to a 30-weight anyways, but has shown to be an extremely good oil, hence its use in numerous high performance European cars from Mercedes and Porsche.

 

[Audi Junkie]

All I read was the original post, and I don't get it. If you have some Mobil 1 Turbo Diesel Truck threads stuck in your head, just use the search and read some Motorcraft 5w-20 used oil analysis.

 

[OVERKILL]

Originally Posted By: Audi Junkie
All I read was the original post, and I don't get it. If you have some Mobil 1 Turbo Diesel Truck threads stuck in your head, just use the search and read some Motorcraft 5w-20 used oil analysis.


I'm sorry, but to bring of Doug again, I don't feel much is gleaned from used oil analysis other than oil life and contaminant levels.

It is his tear-down testing that hooked me on the Mobil 1 Turbo Diesel Truck / Mobil Delvac 1, something I have not seen with the Motorcraft oil.

 

[chet2]

use it...oil is oil, esp the way some people are totally indifferent to oil changes etc and engines still run

 

[Max_Wander]

so now overkill is not torn anymore....well not as badly as his Mobil 1 oil film! J/K

I am thoroughly impressed by that Donaldson filter media and build quality. Maybe a silicone seal and ADBV and that would be a near perfect filter!