Hello,
I have a dozen quarts of M1 15w-50 silver cap of unknown age...API SM, SL/CF
I don't want to just throw it away but its a much heavier viscosity than my gasoline vehicles call for.
I am trying to get a better understanding of shearing and HT/HS.
I have read that it shears quickly in a motorcycle and in a race application down to a 40-weight QUICKLY but can't find UOAs to support it.
It has an HT/HS of 4.5 (based on M1 website)
100*C is 18.1 cSt (based on M1 website)
It is 100% PAO (based on personal statements but I can't find definitive proof).
I have read that dino oils have more VIIs than synthetics and the VIIs shear and this is the reason Synthetics of equal weight are more shear stable.
One of the vehicles I am considering using this oil in a BMW 650 which has a ROTAX single cylinder and a wet clutch. BMW recommends a 10w-40 but some of their bigger wet clutch bikes are now getting filled with 15w-50 when being serviced by BMW.
I will be using this in the hot FL summertime.
Is this product a shear stable oil? If it is likely to drop to a 40-weight then I would be inclined to use it in the BMW 650gs.
Is this a bad idea?
Thanks
I have a dozen quarts of M1 15w-50 silver cap of unknown age...API SM, SL/CF
I don't want to just throw it away but its a much heavier viscosity than my gasoline vehicles call for.
I am trying to get a better understanding of shearing and HT/HS.
I have read that it shears quickly in a motorcycle and in a race application down to a 40-weight QUICKLY but can't find UOAs to support it.
It has an HT/HS of 4.5 (based on M1 website)
100*C is 18.1 cSt (based on M1 website)
It is 100% PAO (based on personal statements but I can't find definitive proof).
I have read that dino oils have more VIIs than synthetics and the VIIs shear and this is the reason Synthetics of equal weight are more shear stable.
One of the vehicles I am considering using this oil in a BMW 650 which has a ROTAX single cylinder and a wet clutch. BMW recommends a 10w-40 but some of their bigger wet clutch bikes are now getting filled with 15w-50 when being serviced by BMW.
I will be using this in the hot FL summertime.
Is this product a shear stable oil? If it is likely to drop to a 40-weight then I would be inclined to use it in the BMW 650gs.
Is this a bad idea?
Thanks