so you saying regular motor oil like 10w-30/40 will be bad for my syncros? maybe thats why my shit grinds some times. My car uses oil too. It uses quite a bit I think which pisses me off because it runs great and I didnt notice it doing that when I bought it. But as far as I have seen and everyone else has seen My car does not smoke, it doesnt leak oil either... where the hell is the oil going?! one of my valves does need to be adjusted because it makes a little ticking noise, could that be it?