Please explain "tricky situations". Oh, and I own two V8s and my fuel bill isn't huge. Far from it!
Someone's going 90 on a highway and I only have a short window to overtake. But it's not so much in a car, I used the gas on the bike when people pulled in front of me and more acceleration is better than less. It's often a better alternative to brakes.
How about "get effed mate!"
I take serious offense to someone flat out telling me what to do. LPG is a pointless, waste of money conversion that certainly won't see 307kw at the wheels with the same mods. And how the hell do you know what anyone gets the most out of? Why do people who drive V6's have to justify it by always saying people that drive V8's don't make 100% use of it? I use 100% of my car EVERY time I drive it!!
It doesn't take much to seriously offend you then. I'm not telling everyone what to do, I'm suggesting a very good alternative.
Unlike my throttle body injected Commodore, you can't notice the difference between petrol and gas unless the Tacho has gone into the red. How often does the tacho in my Commy or the XR see red, very rarely.
Who cares about what a dyno says on paper anyway, I couldn't care less if it lost 3kw at the fly. The drivability is exactly the same. I suggest you drive a direct injection gas kit before you make too many judgements. Also give the guy at LPGas1 a call about power loss, he seems to think his gassed XR8 does just fine at the track.
And it's rubbish that you use 100% of your V8 everytime you drive it. When I put my foot down, my instantaneous fuel consumption is about 100litres/100km. If you do indeed make full use of your V8, then you definitely can't avoid the huge fuel bills you claim to know nothing about.
BTW, you're not getting 307kw at the wheels. Unless of course you've done some serious work.