I am in the market for an LPG V8 , in two or three weeks.
I understand some LPG systems revert to petrol when you floor the throttle.
I often tow a 3.5 tonne trailer.
Do you think the LPG system will revert to petrol when pulling this much weight ?

No it shouldn't do. They only tend to revert to petrol when you plant your foot to the floor and the gearbox kicks right down and the mine only switches to petrol when its approaching 4.5 5k rpm. Unless your trying to drag race with it I think there should be no issues. 2008 TDV8

Thank you. Good to know.

Ive never had it change when i put my foot down and ive done a few "planted foot to the floor going though the rev range alllll the way" and its stays on gas.
I think a good set up and knowing a gas anorak servicing/updating it helps.