Ford 408 stroker build. I can't get high octane gas for my boat at the marina. Small Block Offline Posts: Lead will damage O2 sensors and catalytic converters which can be expensive to replace. DSS Racing has been in the industry for over 30 years. Sincerely Pascal. Recently I was hired to test an octane improver. Fresh silver powder coat frame, no races on fresh powder coat. Thank you Sirs! In the second year, the warranty will cover all parts minus any labor to remove and install needed parts. Matt, I wanted to thank you and your team for doing such a great job building the engine for my Cobra. Fuel Hydrocarbons Put simply, fuel hydrocarbons are compounds that contain both carbon and hydrogen that, when oxidized burnedproduce water and carbon dioxide.