I change my oil and filter every 10,000 km. (6,000 mi.)
Is there ANY advantage to using synthetic motor oil in my moto?
Other than the price, is there any disadvantage?
I've heard everything from "synthetic" is too slippery, or, use only semi synth., or ANY synth will ruin the engine, and so on...in the end, what's the OFFICIAL BMW word on this?
I don't want to void my guarantee and extended guarantee.