Wrong

'Dual Fuel' in this case refers to the model designation and was available as a factory order across the Vauxhall range, including Astra G, Vectra B/C, Omega B and Zafira A.
Not disputing the quality of the installs, but that database is based on the original details as supplied to the DVLA for first registration, and break all to do with being on any lpg database or post registration changes.
If your car was a 'Vauxhall Omega CDX Dual Fuel', then it would have been a factory ordered conversion and registered as that exact model.
But it wasn't

so is simply a 'Vauxhall Omega CDX' which happens to run on lpg and as such qualifies for a £10 reduction in annual Road Fund Licence.
I only posted that as an example of a genuinely rare Omega. Only twenty were ever registered, and all were in the 2000 model year.
Yours, a 2000 CD, is one of 1400 manual 2.2 CDs registered in the same period and therefore isn't, so stop arguing for the sake of it. It only makes you look stupid
