Hi,
i plan to use Mobil1 for my E36 53k miles but dont know if i should use 0W40 or something else.im in Long Island. rarley goes to 10 deg F .
im kinda shying away from 10W30 because i see that its not on MercedesBenz list of oils . I also notice on the 0W40 container that it meets a BMW specification. the 10W30 doesnt. do these synthetics use alot of additives to get such a wide range in viscocity settings ? these additives break down with mileage. or is that just an issue with the old mineral oils ????
also see Gastrol Synthetic 15W50 around.