TB42 & TB45 Fuel Economy

[dom14]

their all guzzlers, my old tb42e used to average 20l per 100 around town, best ever fwy run was 13l per 100, once i turboed it it still averaged 20l per 100 but went a shit load faster.

Yeah, but my RB30 is not any better now, and worse by the looks of it. It burns more LPG and more petrol than ever.
I just can't justify it unless I sort it out, otherwise TB42e is a better choice or TD42, if I can afford it.
The thing I'm really pizzed off about right now is the LPG economy, which I haven't been able to improve, even after installing an AFR gauge kit and tuning it for LPG. I don't care much about petrol economy, 'cos petrol is only useful on extreme outback treks where I can't locate any LPG servos. I have a mutli tank LPG setup, so I dunno whether some LPG get stuck in one of the tanks behind the hydro T valve. I just need to find out, but in the meantime, I'm dying to have a unit with more power.

I used to get minimum of 6km/L on both fuels on highways. Now it's doesn't clock anywhere near that.