Awesome channel! I have a 2004 Toyota Corolla and I was wondering if an LPG installation(with direct injection) would be a good idea to improve the fuel economy? I don't know if LPG is popular in the US but where I live probably 40% of the petrol engines have LPG systems and there are plenty of companies specialized in this area.

it's not popular here, but many countries do use them. JUST have a pro convert it, lots of idiots out there messing with cars