noticed my oil change at 5000miles was done with a 0w40 mobile one synthetic.. Should I ask the shop to change this back to 10w30 or 5w30 or is it okay to run this weight? I am guessing they used 0w40 because it is approved for BMWs..

 

Interesting...


Your oil change was done at the BMW dealership? Or MINI dealership? The 0W30 should be okay, but I'm no expert, and was wondering why they used it in the first place...

 

Yeah, Mobil 1's only BMW approved oil is 0w-40. You should be fine. It's what I'll start using once I go through my 5w-30 supply. It's lighter at low temps for easier starting but heavier at higher temps for better protection. There's a possibility that it'll hurt gas mileage a tad bit but on a car that "only" gets 30-ish mpg, it'll probably be undetectable.

fyi, I use 0w-20 in my Honda Insight. 5 years, 80k miles and no problems.

 

This was done at a independent shop that deals with a lot of european cars..
I guess I'm fine then.. I'm planning to get the oil changed every 5K miles. once at the dealer, and once at this shop .

 

In Australia, unlike most parts of the world it would seem, Mini actually recommend Mobile 1 0w40 synthetic rather than the Castrol synthetic that is recommended elsewhere. So I reckon that you won't have any problems