Thinner oil in 454?

[901Memphis]

Originally Posted By: 901Memphis
Originally Posted By: Blaze
How about Mobil 1 Truck and SUV 5w30? That still has to flow pretty good at start up.


Does anyone know what the differences are between the vanilla 5w30 M1 and the Truck n Suv formula? Is it a more robust add pack or are the specs different too?



Anyone know about my question or is this debate too heated to get me any attention?

 

[daman]

Originally Posted By: Loobed
Originally Posted By: dave1251
What experance? I have not seen any factural experance.

... I would not even try to make this agrument if someone

Also yes there are other factors to lubricaton but the only agrument I have had againist useing a 20WT oil is film strength. How do you measure film strenght?

Most newer browsers have an automatic spell check feature. Could you turn yours on.

What does someones spelling have to do with this thread??? it bothers you that much??
Originally Posted By: 901Memphis
Originally Posted By: 901Memphis
Originally Posted By: Blaze
How about Mobil 1 Truck and SUV 5w30? That still has to flow pretty good at start up.


Does anyone know what the differences are between the vanilla 5w30 M1 and the Truck n Suv formula? Is it a more robust add pack or are the specs different too?



Anyone know about my question or is this debate too heated to get me any attention?

A site search will revile the answer,been talked about many times,search.

 

[ProStreetCamaro]

That engine will live forever on Rotella T6 5W-40. Those engines were never intended to run such a thin oil. Why risk it when we know for a fact a 5w30 or 5W-40 works so well in them?

 

[dave1251]

I have not found a used oil analysis on 454 using 5w30. The best I can find is a 454 that had 20W-50 of course it at the end of the run it was in 40 viscosity range. But this is like compairing apples to oranges.

 

[halseywales]

Originally Posted By: ProStreetCamaro
That engine will live forever on Rotella T6 5W-40. Those engines were never intended to run such a thin oil. Why risk it when we know for a fact a 5w30 or 5W-40 works so well in them?


Because a multi-millionaire does with exotic cars, and he drives them short distances like an old lady. He makes a scientific "white paper" point about how motor oil functions, however that said, This is not the same advice the general actual driving public should follow in teir real cars. I agree wholeheartedly that a 5W-40 or betetr is best for this engine, and every time i think of thinner oil, its true that heat thins oil and that is a legitimate reason for using thicker. Just pointing out some oil facts here.

If anyoe drove his exotic cars even as a normal person that goes on te highway would, his engines would be toast. As is a paralel with this 454 engine, which is actually larger and more powerful than some of his exotics.

Quote:
I have not found a used oil analysis on 454 using 5w30. The best I can find is a 454 that had 20W-50 of course it at the end of the run it was in 40 viscosity range. But this is like compairing apples to oranges.


+1, my Silverado 454SS i had (early 90s special edition) got 20W-50 and loved it.

If i had it still, id have no qualms about a 5W-50 in there. Or Mobil 1 15W-50 or RP 20W-50, and id consider[/b] a 0W-40 in it, or likely a 5W-40. Maybe even a 10W-40.

That was a sweet truck. I forget what owners manual said. But yes.. xW-40 (even 15w40 or 5W-40) or xW-50 (5W-50 if not a 15 or 20W-50 like i had back the) is fine.

The heat makes it fine OF THE MOTOR, and 40 is "ok." As long as it holds up to heat, that is. 30 or 20 WONT cut it.

 

[hate2work]

Originally Posted By: 901Memphis
Originally Posted By: 901Memphis
Originally Posted By: Blaze
How about Mobil 1 Truck and SUV 5w30? That still has to flow pretty good at start up.


Does anyone know what the differences are between the vanilla 5w30 M1 and the Truck n Suv formula? Is it a more robust add pack or are the specs different too?



Anyone know about my question or is this debate too heated to get me any attention?


The M1 T and SUV is good stuff. I would use it over the vanilla 5w30 in any truck or SUV.

 

[halseywales]

Originally Posted By: hate2work
Originally Posted By: 901Memphis
Originally Posted By: 901Memphis
Originally Posted By: Blaze
How about Mobil 1 Truck and SUV 5w30? That still has to flow pretty good at start up.


Does anyone know what the differences are between the vanilla 5w30 M1 and the Truck n Suv formula? Is it a more robust add pack or are the specs different too?



Anyone know about my question or is this debate too heated to get me any attention?


The M1 T and SUV is good stuff. I would use it over the vanilla 5w30 in any truck or SUV.



Be that as it may, it is too thin for this engine.

OP: DONT run thinner oil in this engine. Ok?

 

[Michael_P]

A friend of mine ran 5w20 in his 454 dually for one OCI. He saw massive oil consumption, lifter noise and no better fuel economy. He endned up putting in some STP for the remainder of the OCI. It did help some. But going back to 10w30 was the answer. He did not tow a thing. I wouldn't be alarmed about the high pressures. That the nature of the pump. Heck, put a bypass in there with a pump like that. His engine has forged pistons in it and has piston slap when cold. The 5w20 made it way worse. He got the oil because he got a helluva deal on it.

 

[A_Harman]

Mobil 1 10w30 HM would be a good oil for this engine. I'd pick it in preference to Mobil 1 Truck and SUV.

I had a 1988 C20 Suburban with the TBI 454 from 1995 to 2003. I put Castrol GTX 10w30 in the crankcase, and used it to tow my single car trailer. Since the 'burb had 4.10 gears and the 3-speed auto trans, the engine was turning hard all the time. Never had a problem related to the oil. I had continual problems related to the fuel: it burned too much of it. 9 mpg running free, 8 mpg towing. Life got much better when I got my Dodge diesel.

 

[dave1251]

OP: DONT run thinner oil in this engine. Ok? [/quote]

Why? The OP can run whatever he wants in it. I really do not care if he wants to run 10W60 or 20W-20 in the engine. I am just trying to provide him reasons why he can and not worry about a thing. Did you know GM recommended 5W-20 in 454's when the tempature was 0-60F.

 

[rslifkin]

I didn't know it was recommended. However, I doubt they recommended it for towing. If he didn't work it hard, I would say that outside of very hot weather, it would be fine. However, under heavy load, that engine can put A LOT of heat into the oil, which might cause issues with something thin.

 

[cchase]

Originally Posted By: dave1251
Did you know GM recommended 5W-20 in 454's when the tempature was 0-60F.


Where does it say that? I'm not calling you out, but I'd be amazed as I have never seen a xw-20 recommendation for any GM V-8.

 

[Finn]

Was there 5W-20 oils back in 1995?

 

[dailydriver]

Originally Posted By: halseywales
Because a multi-millionaire does with exotic cars, and he drives them short distances like an old lady. He makes a scientific "white paper" point about how motor oil functions, however that said, this is not the same advice the general actual driving public should follow in their real cars.


Not just that, but also because the wealthy 2%er(s) can afford to replace his/their $80K+ exotic powerplants even if they did NOT drive them like "old ladies" with too thin a grade oil in them, and just happen to destroy said screamer motors.
It's barely a 'dinner' check type inconvenience to them.

Even the chance/thought of having to replace/rebuild even a $2K to $8K engine is a pretty hard hit for the disappearing middle class, shrinking wage, general populace (especially nowadays) to take.