Guys, just a few points here...no one has mentioned a few key facts. Synthetics are produced by modifying the molecules which changes the oil's polarity...in layman' terms this just means the oil's "electrical charge" changes and it actually is the opposite of the engine block polarity, so oil will cling to all contacted surfaces much longer. Equates to less friction at start up...this is where most of your engine wear comes from unless you don't change your oil & filter regularly. Second point, because they modify the molecules, the oil has a lower shear rate....what that means is the oil acts "slicker" or flows better at lower temps thus giving better oil circulation at start up. As he oil begins to heat up to operating temps it reacts like a thicker oil thus protecting like a thicker oil. Now for the good part...this means less friction in the motor and equals less wear, and better performance (even if marginally) and the viscosity modifiers are of better quality which last longer. This is why you can go longer between oil changes. We spend thousands of dollars on our toys & daily drivers...don't skimp in the "life blood" of you vehicle's heart! You want it to last as long as possible, right?
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