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I hear that some gear oils have friction modifiers, and that in some applications such oils are not recommended. I need to change the front diff oil (75w/90) in a 2011 Subaru Impreza automatic, in which the front diff is separate from the auto transmission. If I read correct, then a...

So basically any type of oil that the chart lists will do, but each oil type has its operating temperature range? Therefore for the oil to work good at all times, both hot or cold, I should go with the 75W-90, which can work in all temperatures? But any of the other types listed will also work...

I am going to do a front differential fluid change on my base 2011 Subaru Impreza AT. My automatic model has separate compartments for the front diff and the auto transmission. I need help reading this chart that says which viscosity oil to put in the front differential for the auto model. I...

The front differential is the overfilled one. I thought they probably overfilled the rear as well, but now realize that it is hard to do. The front diff fluid level was checked cold, or possibly a little bit warm (drove it for 5seconds into the garage from the driveway. The car was also driven...

Hello guys, My mother took her 06 Subaru Forester to one of those disgusting quick oil change places, and it appears as if they overfilled the front differential fluid. The fluid was past the top fill mark. My questions are, how bad is this? Is it very urgent to fix? What would happen if I...