A few years ago I put high test Shell in my Camaro. With one tankful they replaced my cat, fuel injectors, fuel sending unit and a few more parts. It was a one time blending error at the port. Shell paid for all of it on my car and hundreds of others. Dont even think for a minute that cannot happen. The question is, who is standing behind the gas. I'll pass on saving a few pennies and getting better gas with a company that would stand behind it. No cheap gas going into my cars that cost so much money.