What type of Oil is right for my Chevrolet and Cadillac?
Your owner's manual will not only list the recommended intervals for changing your oil, but will also list the recommended "weight" of oil to use. The numbers on the bottle of oil are often referred to as the "weight" of the oil. But what does this mean? Many cars on the road today use SAE 5W-30 engine oil. The acronym "SAE" stands for Society of Automotive Engineers. For engine oil rated at 5W-30, the "5" is the cold or winter weight. When oil is cold, it is thicker (think of cold syrup versus hot syrup) and will be more difficult to move through the engine. Engine oils are designed to have a thinner viscosity when cold, thus a "5" rating for this particular oil. Lower viscosity engine oil not only flows more readily through a cold engine, it helps improve fuel economy. The second number of the oil weight "30" is the weight of the oil when hot. Motor oils are designed to get thicker as they heat up to ensure proper engine protection. If you are unsure of which engine oil is best for your car or truck, call our service department at 541-693-5105.