I own a '05 Hyundai Accent and it says to use 5w-20 oil for my car but I have a full container of 5w-30. Can I use that? Any major Problems?
My car has an automatic transmission.
Hello - not ideal perhaps, but yes, you can use the 5W30 oil in your engine. Since we are in the winter months, the lower "viscosity" rating (5), is more important - measuring the fluidity of the oil at lower temperatures. There may be an imperceptible decrease in fuel mileage from the slightly increased resistance of the oil at higher temperatures, but it won’t be much.
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