Synthetic motor oil has been around for a long time, and more and more new vehicles are leaving factories with synthetic in their engines. But a lot of drivers don't really know much about it.
Let's start with conventional oil - the kind folks are used to. Conventional oil is made up of naturally occurring hydrocarbon chains, which means its molecules are long and have various lengths. Like a pile of pencils. Some synthetic oil starts with a petroleum base that's modified and others are entirely synthesized from other materials.
Synthetic motor oil works better in both hot and cold temperatures. It's more chemically stable so it doesn't readily evaporate or break down in the high heat produced inside your vehicle engine. This means it resists turning into sludge, which is a real engine killer.
Remember that marbles and pencils thing we were talking about? Well, that makes synthetic oil slipperier than conventional oil which means less fric
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Q. I have a 2001 Buick Regal which, I understand, should take 4.5 quarts of oil on an oil change, not five quarts. Is the higher amount harmful to the engine? It does read considerably over the full mark on the dip stick when this happens.
A. You are correct on the oil capacity for your car; it is 4.5 quarts. If it is over filled by half a quart, it should not hurt anything, but I would take it back to the oil change shop and have the level adjusted to the proper level.
It is always hard to know exactly how much oil is too much, so it's best to get it right on the nose. While the oil level being exactly on the line is not as critical on your car, it is extremely critical on some of the newer vehicles. The oil level has to be right or it can set computer codes in newer models, and in fact some of the hybrids won't even start.
As long as we are talking about oil, let me use this opportunity to remind our readers not only of the importance of keeping the
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