* Hot climates: You might consider a slightly higher viscosity like SAE 20W-40, especially if you frequently tow or haul heavy loads.
* Cold climates: A 5W-30 might be a better choice for easier starting in very cold temperatures.
Always check your owner's manual for the manufacturer's specific recommendation. While 10W-30 is a common suggestion, the manual will give you the definitive answer based on your specific vehicle's configuration.
Regardless of the weight, use an oil that meets the API (American Petroleum Institute) service classification specified in your owner's manual. This usually involves looking for an "SJ" or later designation (SL, SM, SN, etc., with later designations being better). Modern oils often exceed the requirements of older vehicles, so a newer specification isn't inherently a problem, but following the owner's manual is best practice.
Finally, remember to use the correct oil *quantity*, as specified in your owner's manual. Overfilling or underfilling can damage your engine.
