Question by Sam S: Do different weight motor oils really affect the car THAT much or is it just preference?
My car suggests 5W-20, but if I use, say, 5W-30, what’s the harm? Will I damage the engine somehow? What other negative consequences might result? What about using higher viscosity oils for “older” engines? Is that recommended or does it do any good?
Best answer:
Answer by megp
You should really use what the manufacturer of your car suggests. That is what your engine call for!
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