ENGINE OIL-GEAR OIL FOR THE DT 300 i

[feebleknievel]

okay folks this is not a scientific analysis just a simple whats your opinion on what you may or may not use thank you.

[mrmike]

        Personally I use a 75-90 full synthetic gear oil.  A 75-90 synthetic should work fine in most all weather extremes. I use a 10-40 full synthetic in the motor. I also use synthetic oil in all my other vehicles, lawn mower, snow thrower, and garden tractor. Personally I think it's the way to go.

[de-dee]

  I think mobil 1 full syn.  5 w 50  is best and any 75-90 name brand for rear end,. I have valvaline at this time , royal purple before, sure works for me!!!

[Adept]

According to the manual the gear oil must be replaced at every 5000km. My Grand Dink was at every 10000km.
Why so often??
What is your experience? At my first change the oil wasn't dirty at all (unlike the engine oil)...

[de-dee]

   did you change the oil hot,. at 600 km. dealer changed gear oil at 800 km I changed gear oil hot , you should have seen the crap that came out,. 41,000 km and running great 2011 300i downtown

[Adept]

   did you change the oil hot,. at 600 km. dealer changed gear oil at 800 km I changed gear oil hot , you should have seen the crap that came out,. 41,000 km and running great 2011 300i downtown

Okay, but  did you keep the 5000km interval?

[mjrii87]

0W-40 Mobil 1 for engine (it gets COLD here in Korea) and 75W-90 Mobil 1 for gear oil. Both fully synthetic of course.