rondun
Active VIP Member
On my 05 gmc 5.3l engine I have propane (also gas) the truck gets 19mpg on gas or 18.5 on propane. More power on propane. Pulls better This summer we drove 3400km for under 550.00 pulling a trailer 5000lbs GO PROPANE gas 149.9 propane 69.9 do the math?????