Insurers often ask for a CERTIFICATE of correct installation which is typically £35, they just check to see you have done it right and issue a certificate.
The calorific value depends on whether it is BUTANE or PROPANE, as they are both used and are both different, butane is better by the way.
You can pick up MORE power than a petrol by using SPARK ADVANCERS, if mapped on gas they are more efficient power per litre, AND more powerful, but need correct mapping just like petrol engines to achieve unltimate results.
Diesels can be converted to run petrol but is a lot of work, and not financially viable.
But diesels can be run 100% on HEATING OIL, just put in 2% KLOTX TECHNIPLATE mix, a rangey I helped convert 9 years ago is still running this with over 250,000 miles on it, and HAS been stopped and dipped.
There is no DYE in heating oil as it attacks the seals in heating systems.
tabetha