Since M1 5W 30 runs so thin:

[SAM1]

should 10W30 be used, even in the winter, instead? I read a lot here about engine noise, and high lead… Is the 10W 30 the best way to go?

 

[mikeg5]

if you had to use M1 and you think the 5w30 is too thin go with a 5w40.. the 10w30 is just as thin or thinner in M1. 5w40 in the summer, as for winter why not just go with a different brand if you are questioning M1? M1 isnt that bad just not as good as the hype imo...(that is merely my opinion)

 

[teven7492]

The 10w30 Mobil 1 will be more shear stable than 5w40 Mobil 1. If you think the oil is to thin use another brand.

 

[Titan]

Maybe you just worry too much? B~)

 

[Scimmia]

I haven't been around in a while, but last I knew, M1 5W-30 was actually thicker than M1 10W-30. You're looking in the wrong direction.

 

[Crusader]

What engine & how many miles?

 

[mikeg5]

Quote:

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I haven't been around in a while, but last I knew, M1 5W-30 was actually thicker than M1 10W-30. You're looking in the wrong direction.

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yep, go with the 5w40 IF you have to have M1.. me thinks you need to save $ and with a syn on sale

 

[ARB1977]

Personally thats why i dont use it but even with some valvetrain noise i still see many cars and trucks get very high milage and clean results with moble one.

 

[Crusader]

Since M1 5W 30 runs so thin . . .

Well you can run some M1 10w-30 HM. My local CHina -Mart can't keep the 10w-30 in stock.

 

[Merkava_4]

In my highly scientific observations, a 5W-40 synthetic acts even thinner than a 10W-30 conventional. Chew on that for awhile.

 

[MatchboxCar]

Do you actually have a UOA to back up the contention that it runs thin in your engine?

 

[sxg6]

If you've been researching older threads, m1 5w-30 is no longer considered one of the thinner 5w-30 oils. It's now right in the middle @ 11.3cSt

 

[surfstar]

Heck the 10w30 used to be the thin M1 - I believe they were 10.0, while the 5w30 was 10.7 @ 100*C.