Thanks for that

FYI I have Longreach ute on LPG since 2008 and just updated to a One toner tradesman
The Longreach has been used for ten tow jobs with tandem froma s far away as Coffs Harbour to Western VIC and run in my business now 295000 km having done 130000 since conversiona nd rebate.
Vapour system averages 10L/100KM and LPG has gone from 33 to top 83 Cpl
ULP gone from below $1 to $1.50+
I have been able toc harge out my KM at the commercial rate and made a profit.
Now have One toner on an AEB systm with 275000 km starting ks and new engine and I expect to do the same thing until I retire next year.
The folks who say LPG NWR are flawed in their thinking
Engine oil changes every 5000k are tan at worst never black
Filters every 10000.
I try for SHELL GAS oil but GTX is fine.

Pulled the Longreach engine down to use the pan / sump and nil deposits after 130000 km and slightly recessed valves in 1 and 2 causing leak down.

New vehicle has upper cylinder lubrication system.
FWIW but I always start and run until hot on ULP anyway with very few issues.

2 cents