[edycol]

Originally Posted by vntperformance

Another useless comment.

You got enough useful comments already.
In light of everything, get yourself Prius. BMW is not for you.

[chris719]

Originally Posted by vntperformance

The feelings mutual.

Just making sure that people don't believe you actually know what you are talking about and buy a non-BMW-approved 0W-20.

[M2siast]

My question is, why use a fuel economy oil (0w20) in the M2? Any technical reason? Or is it cheaper?

[chris719]

Originally Posted by M2siast

My question is, why use a fuel economy oil (0w20) in the M2? Any technical reason? Or is it cheaper?

The only reason would be if your manual says to and you want the least potential of warranty claim issues. It's technically worse in all ways but fuel economy.

[KC87ZB]

Originally Posted by M2siast

My question is, why use a fuel economy oil (0w20) in the M2? Any technical reason? Or is it cheaper?

Just to meet the fuel efficiency guidelines so this thing doesn't list as a gas guzzler.

In all seriousness, all manufacturers are trying to get to lower viscosity oils to reduce friction. I don't believe there is fundamentally a technical issue for the lower viscosity and I won't run 0W20 when I am changing my own.

[M2siast]

Originally Posted by KC87ZB

Just to meet the fuel efficiency guidelines so this thing doesn't list as a gas guzzler.

In all seriousness, all manufacturers are trying to get to lower viscosity oils to reduce friction. I don't believe there is fundamentally a technical issue for the lower viscosity and I won't run 0W20 when I am changing my own.

The S58 doesn’t accept 0w20. There is a fundamental technical issue with running too thin an oil in an engine not designed for it.

That’s why I’m confused as to why some are choosing to run it. Is it much cheaper, or what is the reason? I mean, why not just run the required oil?

[BroDoze]

Armchair re-engineering. I know betta than those dumb BMW engine designers.