Quote:
Originally Posted by XutvJet
Anyone notice that for the 2016 M235, BMW is requiring 0W-30 vs 5W-30? OW-30 is arguably a more robust oil for a performance engine, but will impact MPGs slightly. I'm fine with that. Most performance cars in Europe run 0W-30, OW-40, or OW-50. 5W-30 spec oil is very much a US thing and used to boost MPGs. In turbo motors, you want a robust oil because turbos are very hard on oil, specifically heat.
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Don't you have that backwards? 0W30 is thinner oil at start up which may give better mileage but less lubrication. At operating temps they are both 30 weight. To me the 40 and 50 weight oils would be the more robust oils ,not the 0W vs 5W.
Going to 0W oil would be for mileage gains in the M235i like BMW did in switching from 10W60 in the M cars to 5W30 .IMHO