Friend staying with me in CO has a Mazda Speed 3 and left it outside over night when the temp got down to about 10F, maybe lower. We got in early this AM to hit the gym and the car started right up, no fuss and no unusual engine noise what so ever. Dash read 7F at start up. The car felt and sounded as smooth as the 0w40 in my Alti SER during similar starts and RLI 5w40 in my Speed 6. Friend says hes started in much colder temps at the ski resorts, likely -10F often and no issues even then. He's been running the M1 15w50 since about 3K miles. Impressive to me.
M1 15w50 in the cold impressive
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Pour point for the 15W-50 is -39ºF.
Originally Posted By: addyguy
M1's '15W-50' is actually their 5W-50 with a different label - I'm convinced of it!
You could be right. The cold pumping and cranking viscosity of the 15W-50 is much, much lower than I would expect. I think it was as low as their 0W-40 is.
M1's '15W-50' is actually their 5W-50 with a different label - I'm convinced of it!
You could be right. The cold pumping and cranking viscosity of the 15W-50 is much, much lower than I would expect. I think it was as low as their 0W-40 is.
-39 degrees, dont get that cold in tennessee,,,I use 10w30 m 1, never a problem,,I think its good for -50 below f.
JHZR2
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Well back in the days of temperature versus viscosity charts, before things got too dumbed down, a 15w- oil was acceptable for use down to 0-3F in general. And that was conventonal. A syn will give you some better pumping characteristics, and youre good in the range for the lube, so this is to be expected.
Doesnt mean that lubrication, flow and operation cannot be optimized further... Just means that the lube will work as expected. You proved the temp/visc charts to still be accurate!
Doesnt mean that lubrication, flow and operation cannot be optimized further... Just means that the lube will work as expected. You proved the temp/visc charts to still be accurate!
Originally Posted By: dwendt44
Pour point for the 15W-50 is -39ºF.
But what is the borderline pumping temp? That seems the real measure of pumping to critical components....
Pour point for the 15W-50 is -39ºF.
But what is the borderline pumping temp? That seems the real measure of pumping to critical components....
Why isn't he running 0w30 instead of the 50w?
I'm not surprised the 50w did good in the cold, however.
I'm not surprised the 50w did good in the cold, however.
I've thought about running this in my diesel but thought it might be problematic in the winter. Maybe not...
My father ran this oil in his Porsche 944 and it was always eager to start, even when the temps were below zero.
Originally Posted By: Nederlander75
Friend staying with me in CO has a Mazda Speed 3 and left it outside over night when the temp got down to about 10F, maybe lower. We got in early this AM to hit the gym and the car started right up, no fuss and no unusual engine noise what so ever. Dash read 7F at start up. The car felt and sounded as smooth as the 0w40 in my Alti SER during similar starts and RLI 5w40 in my Speed 6. Friend says hes started in much colder temps at the ski resorts, likely -10F often and no issues even then. He's been running the M1 15w50 since about 3K miles. Impressive to me.
I guess I am confused. Up here in Wyoming, we have cars running on 10W30, 15W40, 5W30, 5W20, yad, yada, yada, and they all start right up. People let them idle for less than a minute and drive right off. And mind you it is friggin cold up here, 17* as I type, and got below 0* last night, will get 45* below and more at times, and the cars will fire right up unless the cold kills a battery.
So what is the big deal?
Friend staying with me in CO has a Mazda Speed 3 and left it outside over night when the temp got down to about 10F, maybe lower. We got in early this AM to hit the gym and the car started right up, no fuss and no unusual engine noise what so ever. Dash read 7F at start up. The car felt and sounded as smooth as the 0w40 in my Alti SER during similar starts and RLI 5w40 in my Speed 6. Friend says hes started in much colder temps at the ski resorts, likely -10F often and no issues even then. He's been running the M1 15w50 since about 3K miles. Impressive to me.
I guess I am confused. Up here in Wyoming, we have cars running on 10W30, 15W40, 5W30, 5W20, yad, yada, yada, and they all start right up. People let them idle for less than a minute and drive right off. And mind you it is friggin cold up here, 17* as I type, and got below 0* last night, will get 45* below and more at times, and the cars will fire right up unless the cold kills a battery.
So what is the big deal?
And the benefit of running 2 grades heavier than spec' is what?
And if this foolish sounding fellow has a heavy foot with a cold engine you can count on oil cavitation damage.
And if this foolish sounding fellow has a heavy foot with a cold engine you can count on oil cavitation damage.
Oil choice is out of attempting to mitigate the DI fuel dilution issue and for track days. Warms the car gentle like most here before getting into the accel.
I used to use 20-50 and sometimes straight 40 all year long in the Chicago area.
My cars are always in good tune, so I always managed to get started.
But these were certainly NOT the best oil choices.
My cars are always in good tune, so I always managed to get started.
But these were certainly NOT the best oil choices.
OVERKILL
$100 Site Donor 2021
Originally Posted By: chevrofreak
Originally Posted By: addyguy
M1's '15W-50' is actually their 5W-50 with a different label - I'm convinced of it!
You could be right. The cold pumping and cranking viscosity of the 15W-50 is much, much lower than I would expect. I think it was as low as their 0W-40 is.
The 0w40's pour point is almost -60C. Significantly lower.
Originally Posted By: addyguy
M1's '15W-50' is actually their 5W-50 with a different label - I'm convinced of it!
You could be right. The cold pumping and cranking viscosity of the 15W-50 is much, much lower than I would expect. I think it was as low as their 0W-40 is.
The 0w40's pour point is almost -60C. Significantly lower.
When I used M1 15w50 this year into winter it was pretty clear my truck started harder, cranked longer and the hydraulic tappet racket lasted much longer when compared to M1 0w40 (which I switched to). Sure my truck started on the first try but you could tell the oil was a bit too thick. Works great in the summer
Originally Posted By: OVERK1LL
Originally Posted By: chevrofreak
Originally Posted By: addyguy
M1's '15W-50' is actually their 5W-50 with a different label - I'm convinced of it!
You could be right. The cold pumping and cranking viscosity of the 15W-50 is much, much lower than I would expect. I think it was as low as their 0W-40 is.
The 0w40's pour point is almost -60C. Significantly lower.
Pour Point means nothing.
Originally Posted By: chevrofreak
Originally Posted By: addyguy
M1's '15W-50' is actually their 5W-50 with a different label - I'm convinced of it!
You could be right. The cold pumping and cranking viscosity of the 15W-50 is much, much lower than I would expect. I think it was as low as their 0W-40 is.
The 0w40's pour point is almost -60C. Significantly lower.
Pour Point means nothing.
OVERKILL
$100 Site Donor 2021
Originally Posted By: chevrofreak
Originally Posted By: OVERK1LL
Originally Posted By: chevrofreak
Originally Posted By: addyguy
M1's '15W-50' is actually their 5W-50 with a different label - I'm convinced of it!
You could be right. The cold pumping and cranking viscosity of the 15W-50 is much, much lower than I would expect. I think it was as low as their 0W-40 is.
The 0w40's pour point is almost -60C. Significantly lower.
Pour Point means nothing.
Which is of course the reason it is an advertised spec. I'm glad the ASTM wasted all this money developing these tests and the companies wasting all this money using thim.
MRV of M1 5w40 is 25,400 cST at -35C.
MRV of M1 0w40 is 26,242 cST at -40C.
It obviously has superior cold performance.
I cannot find an MRV data on the 15w50, so we'll have to suffice with these values and the Widman calc ones:
M1 0w40:
cST at 40C: 78.3
cST at 100C: 14
Density at 15C: 0.85
M1 5w40:
cST at 40C: 100.4
cST at 100C: 14.9
Density at 15C: 0.85
M1 15w50:
cST at 40C: 131.2
cST at 100C: 18.1
Density at 15C: 0.87
Widman's calc data:
Code:
GRADE -35C -30C -25C -20C
0w40 11308.5 6706.5 4135.4 2641.8
5w40 32292.6 17380.1 9818.5 5795.1
15w50 49794.3 26423.4 14724.5 8576.4
I know Doug does not put a lot of stock in the validity of the numbers below 0C, but it does give us some points of reference.
I have PERSONALLY experienced the difference between the 5w40 and the 0w40 in my own vehicle this winter. And to say it was substantial would be putting it mildly.
Originally Posted By: OVERK1LL
Originally Posted By: chevrofreak
Originally Posted By: addyguy
M1's '15W-50' is actually their 5W-50 with a different label - I'm convinced of it!
You could be right. The cold pumping and cranking viscosity of the 15W-50 is much, much lower than I would expect. I think it was as low as their 0W-40 is.
The 0w40's pour point is almost -60C. Significantly lower.
Pour Point means nothing.
Which is of course the reason it is an advertised spec. I'm glad the ASTM wasted all this money developing these tests and the companies wasting all this money using thim.
MRV of M1 5w40 is 25,400 cST at -35C.
MRV of M1 0w40 is 26,242 cST at -40C.
It obviously has superior cold performance.
I cannot find an MRV data on the 15w50, so we'll have to suffice with these values and the Widman calc ones:
M1 0w40:
cST at 40C: 78.3
cST at 100C: 14
Density at 15C: 0.85
M1 5w40:
cST at 40C: 100.4
cST at 100C: 14.9
Density at 15C: 0.85
M1 15w50:
cST at 40C: 131.2
cST at 100C: 18.1
Density at 15C: 0.87
Widman's calc data:
Code:
GRADE -35C -30C -25C -20C
0w40 11308.5 6706.5 4135.4 2641.8
5w40 32292.6 17380.1 9818.5 5795.1
15w50 49794.3 26423.4 14724.5 8576.4
I know Doug does not put a lot of stock in the validity of the numbers below 0C, but it does give us some points of reference.
I have PERSONALLY experienced the difference between the 5w40 and the 0w40 in my own vehicle this winter. And to say it was substantial would be putting it mildly.
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