That sounds a lot like what I found when I looked into it some years ago but I never seriously got into looking at it further. I understand the appeal of it in purpose-built engines for forklifts and other small equipment that works indoors but not for highway use.
On a related note, I'd really like to get a mid 1980s Mercedes 300D and put a vegetable oil tank in the trunk. I met a high school kid who did that about 10 years or so ago. At that time restaurants would give him the used oil for free. I think most places charge for it now since it has become more popular.
He installed a tank in the trunk that was operated by a switch under the dash. He'd start the car on diesel and then flip the switch to the used oil after the engine warmed up. All totaled the conversion only cost him about $250. He didn't have to make any modifications to the fuel system or to the oil. It went through an canister style oil filter before entering the fuel system.
The tailpipe emissions smelled like French fries (or nasty fish if he got the oil from Captain D's)
Last edited by Otto Skorzeny; 06/22/2022 4:53 PM.
