it is not the weight of the oil but the additives in the oil. the additive package in the w collector automobile motor oil is specifically engineered for flat bottom lifter gasoline engines without catalytic converters. isn't zinc a banned substance?...
it is not the weight of the oil but the additives in the oil. the additive package in the w collector automobile motor oil is specifically engineered for flat bottom lifter gasoline engines without catalytic converters. isn't zinc a banned substance?...