Dave Gough's letter to Jaguar World Magazine


Dave's Go LPG converted 6.0 Litre Daimler V12


Dear Sirs,

I read with interest the article regarding the use of LPG with our Jaguars. As a regular reader I have often seen reference to such conversions in the pages of Jaguar World Magazine and feel well qualified to comment.

I am in the very pleasant, and I feel privileged, position of owning two such vehicles; a 1993 XJ40 Daimler Sovereign 4ltr, originally owned by Lord Jeffery Archer and a 1996 X300 Daimler Double Six ‘Majestic’ LWB first registered in 1995 and originally registered and used by Jaguar Cars for the first 12 months of its life.

Both vehicles were purchased already converted. The Sovereign has an early type, single point injection system and was purchased from a trader in Derbyshire three years ago, but the Double Six has the expensive, multi-point system, being two x six cylinder systems, and was purchased from Steve Sparrow at Go-LPG.I believe Steve had originally intended to keep this car for his own use and he used it as a test bed to analyse the financial viability of the exercise.

Although the Double Six is a recent purchase, coming into my ownership only two months ago, as mentioned earlier, I have had the Sovereign for 3 years, covered almost 20,000 miles and it has given me no problems whatsoever although the single point injection system tends to stunt the performance of the AJ16 engine; rapid overtaking manoeuvres can be planned ahead and a quick flick of the switch back to petrol and into “Sport” mode restores all the power and performance. No such problems exist with the Double Six with the multi-point system, just plant the right foot into the carpet and the magnificent V12 gives its all. To date, I have never felt the need to resort to the use of Sport mode, the thought of this power being unleashed is daunting.

From my experience, I can fully endorse the use of LPG in our cars with the reservations mentioned regarding the slight difference in fuel consumption and performance. I can also agree with the comments regarding Go-LPG. Steve Sparrow was extremely helpful and is extremely knowledgeable regarding LPG systems in general and about Jaguars in particular. He personally described himself to me as an “anorak” when it comes to Jaguars and he certainly knows what he is talking about.

There are a couple of areas I would question with regards the article in JWM; firstly, I would be pleased to know how to go about getting the reduced Road Fund Licence. I have requested this information from our local Tax Office, the Post Office and searched the DVLA web-site all to no avail. I would also question the potential range of a given gas tank. Whilst the nominal gas tank capacity might well be 88lts., it will only be possible to utilise approximately 60% of that capacity before loss of pressure takes over. The potential range therefore will not be 88lts multiplied by the average fuel consumption and will be reduced by approximately 40%.

With regards to fuel consumption, my Sovereign regularly returns 22mpg and has exceeded 28mpg on a long run using the cruise control. As mentioned earlier, I have only recently purchased the Double Six but I recently completed 650 miles when I took the car on holiday to Jersey. For those who don’t know there is a blanket 40mph speed limit in the Island, which is fairly academic because the roads are too narrow to travel at much more than 30mph in most places and sometimes this is reduced to 20mph, especially in something the size of Daimler Double Six LWB. Given that the journey to and from the ferry from Weymouth was conducted at motorway speeds, I was very content to return 16.5 mpg overall for the 650 miles. At petrol money this equates to more than 32mpg! Where else could anyone obtain such comfort, elegance and performance for such a cost?

Keep on LPG motoring.

Dave Gough

Workshop Manager


On 16/10/10 Dave hed seen this item and kindly wrote an update;

'I note my letter to Jaguar World has been reproduced and I would add that I am still delighted with "The Duchess".

I have a fully expensed Company car but very often use my Daimler for work, at my expense, because it's such a delight to drive. I have had the car 2 1/2 years now and covered more than 11,000 miles in that time. I have no fears about taking the car anywhere; having been to Jersey, Cornwall, the Isle of Wight (twice) and toured Wales. On my last trip to the Isle of Wight I got a fuel return of 17.9mpg which is the petrol price equivalent of around 36mpg! The car has never missed a beat, the LPG system you installed has been totally reliable and I know that if I need any help or information I can contact you any time.

An all-round great car that returns admiring looks wherever I go. I can't see any time in the foreseeable future when I would consider parting with it.

Keep on doing what you do, you do it well.'

Kind regards,

Dave Gough.

I'm sure there will be some folk reading this study with a cynical eye, ranging from those who merely think there is not enough proof published to back the claim right through to those that may accuse us of making it all up. Naturally, we cannot give contact details for Dave as he'd be inundated with questions, spammed like crazy and in the case of one or two internet extremists, perhaps sent viruses or defamed and abused. I'm sure most would agree that Dave has a right to his privacy and complete protection from this.

However, there is a way that those wishing to validate this information can do just that.

Under recent Consumer Protection Legislation it is an offence to 'mislead the consumer' by making invalid, inaccurate or groundless claims. If anyone has doubts about this study or any of the information contained within it, all they need to do is make a complaint to their local Trading Standards Dept. who will investigate.


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