Some of you are remarking about engine oil. I have three advanced degrees in chemistry and spent a lot my career in the lubricants area. Generally, about oils is . THEY ARE ALL THE SAME THING. Just buy the cheepest and change oil a lot. 3 to 5,000 miles. I make a oil that is different. It is based on silver chemistry. Makes all of my cars run great. My 2014 Chevy spark humes along now really quiet. My oil is called Silver Series. Been making it for 20 years. Retired now . just make it in 4 gallon batches.