Even the factory service manual doesn't say when to change it! Just says Castrol SAF-XO, 750ML. BTW, now called Castrol Syntrex...
I now have 8K miles and thinking its about time.
Any guess's???
Castrol SAF-XO has been superseded by SAF-XJ (75-140), the only difference the XJ is for limited slip rear axels, I use Amsoil Severe Gear 75-110.
BMW would like you to believe you have to use there oil or something bad will happen. Not the case in fact that is illegal. As long as what you put in meets the same specifications you can use it. Any good quality gear oil would be fine.
What about the CVT gear box oil, that is subject to more heat and stress than the chain case, I find no schedule for change and it is a 75-90 requirement.
Yellasei, look up task 23 00 510 Gearbox-oil Change. This calls for 250 ml of SAF-XO.
As long as the oil hasn't leak out you could easily go 25000 miles Also why do they want to change the chain and sprocket at such short intervals. Why bother with and oil bath? Hmmmm!
No, the chain and pinion gear are both available; they'll set you back about $150.00, plus guides, if necessary. The OTHER, larger gear (#6 in the diagram) is not even listed...but shouldn't wear as fast as the pinion gear.
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now that surprises me, i had to remove a motor from a GT this summer with around 2600 miles on it and when i drained the chain case oil it was very clean.I had the oil in the chain case changed at 1500 miles and it was in a shocking state the mechanic who did it said the oil gets initially contaminated from the new chain grease etc., my advice guys get it changed looked easy from what I saw just the cost of the fully synth oil.
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