This is an extension of my earlier thread regarding oil for my E30 325.
In my area, my temperatures range from 50 to 70F all year. The manual recommends 10w-40 for this car in temps up to 68F, but 15w-40 is the ideal oil for all temps, per the manual.
A lot has changed in oil technology since those recommendations were made in the 80s. 10w-40 is more commonly available and gives far more choices (High Mileage, Blends, Full Synthetics) than 15w-40.
Is there any good reason why I should choose a 15w-40 over a 10w-40? So far I haven't.
Thanks.
In my area, my temperatures range from 50 to 70F all year. The manual recommends 10w-40 for this car in temps up to 68F, but 15w-40 is the ideal oil for all temps, per the manual.
A lot has changed in oil technology since those recommendations were made in the 80s. 10w-40 is more commonly available and gives far more choices (High Mileage, Blends, Full Synthetics) than 15w-40.
Is there any good reason why I should choose a 15w-40 over a 10w-40? So far I haven't.
Thanks.