Quote:
Originally Posted by Amaru
BMW recommends 25,000km oil changes... sure, it's probably fine after 25,000km, but do you really want to risk it? That's especially insane for people who only drive their BMW as a "summer" or "weekend" car. They could go 3-4 years between oil changes.
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I thought it was xx,xxx km OR 1 year, whichever one comes first. But with that said, synthetic oil doesn't just magically go bad. This ain't dino oil. Usually the oil takes a few months just to get from the lab/factory to the store shelf, then who knows how long it sits there or in some guy's garage before getting poured into an engine. It's kind of like food. Milk is the only food I can think of that actually goes bad on the expiry date. (yes, I eat expired food all the time, haven't died yet.
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MB increased their service intervals to 15,000 in 1998, then 20,000 in 2005. The funny part is that these changes happened
without developing new engines. Not sure about other makers but MB only really changed the list of recommended oil, and in some cases, changed the material in the filter. There is much talk on the MB forums of people who increased their service interval simply by getting the "higher" grade of oil local and having the new filters (not available in North America) shipped in from funky places like South Africa.
I remember my SA at the dealer mentioning that the oil can actually easily go 25,000km+, but most of the customers are "old school" and couldn't handle the sudden jump, so they had to phase it in over the years.
I remember my dad freaking and driving down to the dealership, where the SA had to show him the official MB bulletin on paper.