× Auto Repair Pros Member Benefits TechHelp Knowledge Base Forums Resources My iATN Marketplace Chat Pricing About Us Join Industry Sponsors Video Members Only Repair Shops Auto Pro Careers Auto Pro Reviews
Join Now
International Automotive Technicians Network
Re: 1967 Mecury Parklane 410 octane requirements
Posted to Technical Discussion Forum on 5/20/2007

[...trimmed text...]

I think it has more to do with lead. Tetrahedral lead had a calming effect on spark knock that unleaded doesn't.

Login to read more.