Join Date: Apr 2002
Location: Dandridge (Near Knoxville), TN, USA
Originally Posted by Josmas
So, I go to my local dealer and ask for final drive gear oil and gearbox oil and the sell me BMW "super synthetic" 75W/140 GL5. The manual calls for SAE 90. The service tech said the 75 would be fine. I used it but I thought I'd ask...
Is it OK?
Also, the manual calls for .24 US quarts for oil changes. I got about .5 quarts in. I did give the wheel a spin as I filled it to get the air bubbles out. Did I fill it too much?
75/140 is actually better, as it is multi range for temp variations. Like multi grade oils, 75 means that it has the viscosity of 75 straight grade oil at low temp, 140 grade at high temp. Straight 90 will have a higher viscosity at low temp, lower at high temp.
You should not have been able to put .5 quart in! It should only have 260 ml, which is around .25 quart. It should only be filled to about the bottom of the threads for the fill plug. Too much can cause foaming and oil coming out of the vent on top of the drive. I would remove some.
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