I bought a Mercury outboard 115hp 1987 power thrim oilinjected,but the oilinjected sytem is with an autoblend the one tha use a module, the motor have the 6 cylinders, good compresion 120ps and 115ps, My question is should I get rid off it and go with the premix or should I keep it, I been hearing tha this autoblends are not good? this autoblend is oringinal from the motor, because on the cover of the motor saids oilinjected,any advice please. 