I have never heard of Havoline, and have just learned, that Chevron makes motor oil. It is my understanding, that Chevron owns Havoline, which was once Texaco. I thought Chevron was always just involed with gasoline, and Diesel vehicles. Are these good oils? How do they compare to the likes of Valvoline, and Shell/Pennzoil. I may never come to a conclusion about oil. This site is an addiction, and has really becoming a daily read for me. Thanks for any input. Have a great day!