Yes. People on track regularly use 15W50 in BMW’s.i guess you mean within recommended grade/hths ..mine is from 0-30 to 5-40 hths min 3,5.
can i use a 10-40 with hths 3,7 since bmw approvals are defined by hths? and this oil has an hths within my approvals?
ok, oxidation probably will be not the appropriate one thats why bmw will not approve it but as far as hths its within bmw/s approval .