Hi Don.
The figure are relative.
We pay about 86p a litre (do about22 mpg) for petrol
I pay about 45p a litre and do about 17 - 18 mpg. for lpg
Yes there is a reduction , but the cost of the lpg makes a huge difference, my system is still settling down and is purposely set slightly rich, when i've done 1000miles the installer is having it back to check it over and do the final set up. Might even get better mpg
Included in the price was : a courtesy car, 2 year warrantee, free 1000m gas service, he is a certicated installer,
Lez