What Kind of Oil Does My Car Take? John Baker | Oct 29, 2015 11:30:14 AM One way to find out is to go out to your car, dig the owner’s manual out from under the napkins and pairs of sunglasses in the glove box and look it up. Or, you can consult the AMSOIL Product Guides at amsoil.com . Simply enter your vehicle information and follow the prompts. Your vehicle manufacturer will typically recommend an oil of a specific viscosity (e.g 5W-30) that meets the latest industry specifications. For most domestic cars and trucks today, it’s API SN. But some vehicle manufacturers recommend oils that meet their own, proprietary motor oil specifications. Although the practice is more common with European cars, General Motors recommends using a motor oil that meets its dexos1™ specification in many of its cars/light trucks. How do you know if your oil meets t...