The best motor oil for most car engines depends on the relative age of the car. Synthetic motor oils, such as Amsoil Synthetic Blend 15W-40 Heavy Duty Motor Oil and Mobil 1 10W-30 Full Synthetic Motor Oil, are best for m... More » Vehicles Car Parts & Maintenance Engine Oil

The best way to find the correct engine oil for a car is to check the owner's manual for the manufacturer's recommendations. This lists the oil that the manufacturer designed the engine to use. More » Vehicles Car Parts & Maintenance Engine Oil

The best diesel oil for an engine depends on the type of vehicle and how often the oil is changed. However, most diesel engine oils should be heavy-duty, fully synthetic products designed with high performance in mind. More »

The best time to check the oil of a car depends on its age; older cars require cold engines for oil checks for the most accurate readings, while dipsticks on newer cars are made to accommodate warm engines. Whenever the ... More »

The API rating system for motor oil grades oil based upon its performance in a variety of tests that determine its suitability for certain kinds of engines. The American Petroleum Institute uses its Engine Oil Licensing ... More » Vehicles Car Parts & Maintenance Engine Oil

Vehicle and equipment owners use non-detergent motor oil for the purpose of preventing overheating and to maintain the proper functioning of engines. Non-detergent oil works by lubricating an engine and cooling the inter... More »

The 2007 Saturn Ion was offered with three different engines and all of them require 5W-30 motor oil, according to AutoZone. Some of the recommended brands are Valvoline, Quaker State, Havoline, Mobil 1 and Pennzoil. More »