It is simple arthritics.
USA Old man riding with 60mph 5w30.
Europe/Germany BMW riding with 120mph 10w60 = 2x 5w30
Now serious.
As already mentioned 10w60 especially castrol is used in race conditions where oil temperature is higher than that can be experienced by average European driver. I wouldn't even try to compare with average US driver.
Castrol 10w60 TDS gives viscosity not only at T=40 and 100 degree Celsius. but also at 150/160
In such race conditions 10w60 is even tiner that 5w30 used by average US driver.
BTW BMW is not the only one. Some Alpha Romeo are using too.
So most race cars are using this thin 10w60 oils.
I read in this forum that experts here advice to use 0w20 in Ferrari. I think that they are right. In such mild condition/low oil temperature/ the average ferrari US driver will take the advantages of 0w20. However racer will go with recomended 15w50 or even 10w60
USA Old man riding with 60mph 5w30.
Europe/Germany BMW riding with 120mph 10w60 = 2x 5w30
Now serious.
As already mentioned 10w60 especially castrol is used in race conditions where oil temperature is higher than that can be experienced by average European driver. I wouldn't even try to compare with average US driver.
Castrol 10w60 TDS gives viscosity not only at T=40 and 100 degree Celsius. but also at 150/160
In such race conditions 10w60 is even tiner that 5w30 used by average US driver.
BTW BMW is not the only one. Some Alpha Romeo are using too.
So most race cars are using this thin 10w60 oils.
I read in this forum that experts here advice to use 0w20 in Ferrari. I think that they are right. In such mild condition/low oil temperature/ the average ferrari US driver will take the advantages of 0w20. However racer will go with recomended 15w50 or even 10w60
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