Originally Posted by bluesubie
This is not good for the rear diff nor the transmission as they both spec GL-5. Shifting my feel fine, in fact it may feel much better, but a GL-5 oil contains 30-50% more Extreme Pressure/Anti-wear additives than this GL-4.
It says its approved by Subaru though? This car is hardly driven hard at all... When she consistently gets 550-600km to a tank of gas 100% inner city driving, that should give you am idea as to how hard this car gets driven