LPG vehicle conversions

20-25% reduction would be doubtful IMO. I really don't notice the diff at all in my Patrol, but i do hear people say you lose power. Yes you use more than you do with petrol. I guess it would at worse half your fuel bill. So do your sums on kms travelled in a year, expected savings, how long you expect to keep the car and go from there. As for the brands, I can't fault my Impco. Like Rod i was lucky enough to get mine with the gas, maybe you could hunt for a second hand unit to make it cheaper?

I got Tartarini Injected Gas System, and 5% would be the max power loss.....
You can't really tell the diffrence if it using petrol or LPG without looking at the
petrol/lpg switch....

we've had gas on our commodores for a total of 15 years now and never have we regretted it. we notice no lack of power certainly NOT 25%.we have had our 91 commodore dino tuned and on the dino there was no different between gas and petrol still over 100 h/p, that was with the impco set up. we have had impco, lavarta systems and we now have the mega gas unit (due to the all mighty dollar). the best one by quite a way was the impco, the mega gas is the Australian unit and has a 3 year round Australia warrenty and was around $1,000 cheaper to convert than the impco.
one thing to remember is to run oil injection as this is what we think has helped our cars last so long, the 91 commodore has now done over 700,000klms and never had any motor work done on it except oil changes ect and oil treatment.
good luck hope this helps.

25% power loss????

All right I'll be corrected to a certain degree. I worked the 20%-25% on the basis that I get 5.6ks per litre on petrol and 4.6ks per litre on gas thus being 20%-25% difference.