he was just telling me about the best stuff you can buy. A friend of his hadn't changed his oil in 3 years using this stuff. Too crazy for me to believe or understand. but, he did end the conversation by stating that if I went this route I'd still have to change it ever 3K miles in order to preserve my warratny. So, I plan on using the stuff at the Oil Lube places every 3K miles, like castrol or mobil. Which are a step below this AMSoil. I wouldn't want to spend nearly $100 every 3K anyway.