can synthetic oil be used on a 1995 olds Achieva 3.1
What is your question?
Went to get oil change at Chevy dealership and they told me they now only use synthetic I ask and state that i didn't think it was safe as its an older car. They Supervisor bob said oh its ok and they used4.5 quarts of Dexos 1
So is it safe for them to have done this. Will it ruin the seals or anything else in the engine and if it does then are they liable.
Thanks in advance for you help.
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Synthetic oil won't harm anything it's just not necessary to use it that engine .. Recommend using conventional oil at next engine service.
Synthetic oil isn't worth the cost difference for that particular engine with the mileage that it probably has on it.
Stuck with what got it to this point!
Synthetics tend to have more detergents in them. The new oil isn't the problem. It's all of the old gunk that the detergents will loosen up and allow to now float through the engine. Hopefully they make their way to the oil filter and don't cause an oil passage to become clogged.
