For engines, synthetic is better. Here’s why. Conventional motor oils can lead to carbon buildup on pistons, in the combustion chamber, and on the back of the throttle blades, all of which can lead to engine noise, reduced power, and drivability issues.
During the combustion process, engine oil sneaks into the chamber through the PCV system and in the form of blow-by from the crankcase. Since conventional oil is rich in carbon, deposits form. Carbon, which is nature’s molecular magnet, cakes beautifully on pistons, valves, throttle blades, and combustion chambers. And when engines face severe loads, such as pushing a boat, it only makes things worse.
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