Toyota 5.7L, 0w-20 noisy, STP to thicken?

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Originally Posted by kschachn

Like I said there is no 0 grade oil. A multi-grade 0W-20 oil is not a "0" grade when cold and a 20 grade when hot, which is what you.


I will have to dig out photos but Mobil 1 used to sell plain Zero weight oil without the W in there and no multi viscosity.

It actually worked pretty well in our old cars during the dead of winter.

I always wondered what happened to that stuff
 
Originally Posted by Rmay635703
Originally Posted by kschachn

Like I said there is no 0 grade oil. A multi-grade 0W-20 oil is not a "0" grade when cold and a 20 grade when hot, which is what you.


I will have to dig out photos but Mobil 1 used to sell plain Zero weight oil without the W in there and no multi viscosity.

It actually worked pretty well in our old cars during the dead of winter.

I always wondered what happened to that stuff

Is that possible? If so doesn't it mean the oil would be way too then while hot? Like water?
 
Originally Posted by Ablebody
Originally Posted by Rmay635703
Originally Posted by kschachn

Like I said there is no 0 grade oil. A multi-grade 0W-20 oil is not a "0" grade when cold and a 20 grade when hot, which is what you.


I will have to dig out photos but Mobil 1 used to sell plain Zero weight oil without the W in there and no multi viscosity.

It actually worked pretty well in our old cars during the dead of winter.

I always wondered what happened to that stuff

Is that possible? If so doesn't it mean the oil would be way too then while hot? Like water?


Given it isn't a real grade it probably was a marketing thing and the oil was probably a 0w-20 or something similar.
 
Originally Posted by OVERKILL
Originally Posted by Ablebody
Originally Posted by Rmay635703
Originally Posted by kschachn

Like I said there is no 0 grade oil. A multi-grade 0W-20 oil is not a "0" grade when cold and a 20 grade when hot, which is what you.


I will have to dig out photos but Mobil 1 used to sell plain Zero weight oil without the W in there and no multi viscosity.

It actually worked pretty well in our old cars during the dead of winter.

I always wondered what happened to that stuff

Is that possible? If so doesn't it mean the oil would be way too then while hot? Like water?


Given it isn't a real grade it probably was a marketing thing and the oil was probably a 0w-20 or something similar.

I see.
 
Originally Posted by ka9mnx
I'm a Mobil1 user and I agree. Mobil's formulations over the, at least, 10 years has been towards better fuel economy. The noise is there but not that bad, But, as those in the know have said here noise doesn't necessarily mean wear.


I would say it's closer to 20 years. I used 5W-30 Mobil 1 in my new 1998 Chevy K1500 back in the day and the engine was pretty noisy with this oil. I still used it for several years and then switched to conventional Chevron Supreme and the noise was gone. I haven't used Mobil 1 since and I still own this truck and the engine is still quiet. Using 5W-30 Castrol HM in it now.
 
Originally Posted by wtd
Originally Posted by ka9mnx
I'm a Mobil1 user and I agree. Mobil's formulations over the, at least, 10 years has been towards better fuel economy. The noise is there but not that bad, But, as those in the know have said here noise doesn't necessarily mean wear.


I would say it's closer to 20 years. I used 5W-30 Mobil 1 in my new 1998 Chevy K1500 back in the day and the engine was pretty noisy with this oil. I still used it for several years and then switched to conventional Chevron Supreme and the noise was gone. I haven't used Mobil 1 since and I still own this truck and the engine is still quiet. Using 5W-30 Castrol HM in it now.


This is why I steer away from M1..
 
Last edited:
Hmmm....I am guessing here...

Are "noisier" versions of M1 those with lower HTHS (less cushion between moving parts)?
 
Originally Posted by Kamele0N
Hmmm....I am guessing here...

Are "noisier" versions of M1 those with lower HTHS (less cushion between moving parts)?

I don' know. I know the AFM types are on the low HTHS side but the vanilla and exotic versions of Mobil1 are on the thicker HTHS side. I've used Mobil1 since 1976 and haven't experienced the noise issue...
 
Originally Posted by Rmay635703
Originally Posted by kschachn

Like I said there is no 0 grade oil. A multi-grade 0W-20 oil is not a "0" grade when cold and a 20 grade when hot, which is what you.


I will have to dig out photos but Mobil 1 used to sell plain Zero weight oil without the W in there and no multi viscosity.

It actually worked pretty well in our old cars during the dead of winter.

I always wondered what happened to that stuff

Now I'm curious? I have an original Mobil1 can from 1976 and it says SAE 5W-20 "Outperforms 10W-40 premium motor oil". Pretty bold statement!
 
Originally Posted by ka9mnx
Originally Posted by Rmay635703
Originally Posted by kschachn

Like I said there is no 0 grade oil. A multi-grade 0W-20 oil is not a "0" grade when cold and a 20 grade when hot, which is what you.


I will have to dig out photos but Mobil 1 used to sell plain Zero weight oil without the W in there and no multi viscosity.

It actually worked pretty well in our old cars during the dead of winter.

I always wondered what happened to that stuff

Now I'm curious? I have an original Mobil1 can from 1976 and it says SAE 5W-20 "Outperforms 10W-40 premium motor oil". Pretty bold statement!


"back in the day" that 10w-40 would have been made with relatively thin Group 1 most likely with a low VI, which would have required significant quantities of what were primitive VII's at the time, to achieve the hot visc. It would have sheared quite easily and definitely have provided poorer performance than what was probably a VII-free 5w-20 made from PAO.
 
As I remember the 5w-20 was a PAO VII free oil and you are correct about the 10w-40's of the day. Which is why GM condemned it in the 80's
 
Originally Posted by ka9mnx
As I remember the 5w-20 was a PAO VII free oil and you are correct about the 10w-40's of the day. Which is why GM condemned it in the 80's


So, that in mind, the 5w-20 would have had an HTHS closer to that of a current 5w-30 if that helps with the conceptual side of things. The "old" HTHS limit for the 10W-40 designation was 2.9:
[Linked Image]


But has since been bumped up to 3.5 for 0w-40, 5w-40 and 10w-40.

If we look at Mobil's present PAO lineup, their 8cSt PAO has an HTHS of 2.58 and of course will not shear. Blended a touch thicker with one of their heavier ester base stocks to aide in seal compatibility, you likely have something that hits around 2.7-2.8 on the HTHS side of things that won't shear down.
 
Originally Posted by ka9mnx
Originally Posted by Rmay635703
Originally Posted by kschachn

Like I said there is no 0 grade oil. A multi-grade 0W-20 oil is not a "0" grade when cold and a 20 grade when hot, which is what you.


I will have to dig out photos but Mobil 1 used to sell plain Zero weight oil without the W in there and no multi viscosity.

It actually worked pretty well in our old cars during the dead of winter.

I always wondered what happened to that stuff

Now I'm curious? I have an original Mobil1 can from 1976 and it says SAE 5W-20 "Outperforms 10W-40 premium motor oil". Pretty bold statement!



Well. You can look at it this way outperforms can mean a few things, cold weather performance, less deposits, better fuel economy, stay in grade, extended OCI, ect. We can say with a certain degree of confidence M-1 of this era outperformed its 10W40 counter parts of this era.
 
How true. I remember the magazine adds touting: extended oil changes of up to 25,000 miles or 1 year, better fuel economy and makes your engine start easier down to -50F.
 
Thanks everybody for the suggestions and discussion.

I ended up changing it all from Mobil 1 0w-20 (about 300 miles on it) to Pennzoil Platinum 5W30 HM. Quickly quiet on start up, and immediately quiet on the next cold startup (20 degree F) as well. Thanks for your input!
 
Originally Posted by LS_Powah
Thanks everybody for the suggestions and discussion.

I ended up changing it all from Mobil 1 0w-20 (about 300 miles on it) to Pennzoil Platinum 5W30 HM. Quickly quiet on start up, and immediately quiet on the next cold startup (20 degree F) as well. Thanks for your input!

It looks like you found your new oil.
wink.gif
 
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