Vehicles with LPG conversions, the heads once removed look brand new.
Back in the days with my 1.3l carb Peugeot 309 *105k on the clock, i stuck the fuel feed to the engine post filter directly into a can of the below ran the the engine and it smoked the whole road out. I was a bit scared as once the can had empty'd i could turn the engine off, had to stall it lol
Bought another can and did the same thing the following weekend to show off to my little brother and it puff'd out a few clouds of smoke and that was it - so for me that stuff worked.
https://www.amazon.c...t/dp/B0035PSQ30
That stuff does look tempting to be honest, don't suppose it would harm to try it...Would it?