I made a thread earlier about which gas is best used. well i used 93 last night and i felt a bad difference, just now i started my car, i put my foot on the clutch and its so damn soft, when i shifted to reverse, it was hard as hell, took alot of force to put it into reverse, same to first and 2nd. whats going on? is it better for me to fill the other half with 87, but i dont think gas is good when its mixed like that....