I missed the opportunity to purchase the lpg setup
I also have a new car now, and I am thinking about methane injection. My route is 30 km * 2 (40 mi round trip) which usually involves traffic.
Although i have most of the equipment, i do not want to mess around with CNG.
I am thinking low pressure natural gas, pumped with a small diaphram air pump.
Methane stored in an air mattress with roughly 200*100*20 cm dimensions. That would be 0.4 m^3 of volume or 0.4 liter diesel equivalent of volume. 40 cents worth of fuel.
Car burns approx 5l/100km on average on this trip. So 3 liters.
Seems I can get %10 substitution from 1 airmattress.
