btfarm
America First!
I'm due again for a differential gear oil change. I went about 5k with the factory grape juice, then 110k with Mobil1 75W90 then another 70k with Amsoil 75W90. I've noticed it getting a bit 'grabby' in turns so I want to do a change. While I'm at it, I want to assure myself it isn't something with the Amsoil... which leads me to my question. I have done some looking around and it's damn near $11 per qt for the M1 75W90 synth now. I can get the Supertech equiv for about 1/2 that. I've heard only positive remarks about the Supertech oils these last few years and am tempted to buy 6 qts of it instead of the M1. Any comments?