Hello everyone, I've been reading these forums for several months and figured I'd sign up and ask a burning question.
So background, I have a 1987 BMW e28 (m30 engine) that's seen 20w50 oil for most of my ownership which has primarily been Castrol. I've used Mobil 15w50 before and had people tell me it wasn't necessary for my engine, well after some research I've found that my engine needs a little higher zinc content than most engines I already know that Mobil has good zinc levels but I can't find any info on castrol so I have come to the conclusion of trying out some diesel oils after reading about people using them in there non-diesel vehicles. I went to my local Walmart and picked up some Rotella T4 that was still sm rated (there were ck4 bottles mixed in the stock) also some Castrol diesel truck 15w40 that was on sale for 9.80, why not right?
So my question, is there anything to be worried about in using with of these oils in an older engine like mine that likes a lot of zinc? I don't drive like a grandma either so that's why I'm like paranoid about finding cost effective oil to keep her happy.
So background, I have a 1987 BMW e28 (m30 engine) that's seen 20w50 oil for most of my ownership which has primarily been Castrol. I've used Mobil 15w50 before and had people tell me it wasn't necessary for my engine, well after some research I've found that my engine needs a little higher zinc content than most engines I already know that Mobil has good zinc levels but I can't find any info on castrol so I have come to the conclusion of trying out some diesel oils after reading about people using them in there non-diesel vehicles. I went to my local Walmart and picked up some Rotella T4 that was still sm rated (there were ck4 bottles mixed in the stock) also some Castrol diesel truck 15w40 that was on sale for 9.80, why not right?
So my question, is there anything to be worried about in using with of these oils in an older engine like mine that likes a lot of zinc? I don't drive like a grandma either so that's why I'm like paranoid about finding cost effective oil to keep her happy.