Refill Co2

[KGB]

That's because they are different products. The LPG you use in your car is a different mixture of Propane and Butane than what is used in gas for the BBQ. I used to refill my 9kg bottle from them autogas pump to save a few bucks but it wouldn't empty properly. I used to have to shake it to get the gas out, this isn't a problem in a moving car.

Also think about how much gas a car would go through - I'd be interested to see what sort of deposits form in a bbq when you start cranking that much gas through it.

I think the rental rort is worth a try, especially if you can arrange a pay by month deal. Otherwise, sell it on ebay and pick up a CO2 extinguisher for $<50 and you're sweet. Food grade schmood grade.