Originally Posted by MEPEH

I'm very interested in this too. I've had lots of cars on propane in europe and once i moved to US, everyone looks at me like a weirdo, when i mention natural gas cars.

The price of installation is pretty high here though. I could get one installed in eastern europe for about 1000 euro, and it had injectors in the intake. Would start on regular gas first, and once warmed up will switch to propane automatically. Savings were huge on gas.

Not sure why americans hate it. I have a 5.0 Engine in my CL500 and i barely touch the throttle to save gas. I'm definitely not using all 320hp of that engine. I think between 2000-3000rpm i'm only at about 200hp. Why not convert to gas and save money.
Plus in CA you get access to the Carpool lane if you have natural gas.

I'll follow this thread and watch how it goes. I've done it myself once and routing the copper lines is a *****. Everything else is pretty straight forward

Threads like these show up more and more, unfortunately, none of the ones i'm subscribed ended up with success.

Other things to remember is the engine will run colder on NatGas. And NatGas doesn't have the lubrication properties of regular gas, so you need to look into using other oils. They had special oils in europe for these applications (same price as normal oils)
Someone mentioned that there's less energy in NatGas. The Octane number is much higher, i think it's somewhere below 110 Octane.
The systems let you adjust the flow of gas so you can turn it down a bit and have equal consumption on both fuels.

I really dig the idea. Just not sure if it makes sense financially to get the installation at 5000$.

Can someone with good math skills, calculate, how much time it will take to recover the investment ?