Thread: Engine 850: B5252S/2.4/10v: - Pros and cons for LPG conversion
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Old May 12th, 2019, 13:21   #25
djtaylor
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Last Online: Aug 6th, 2020 09:12
Join Date: May 2019
Location: Derby
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Originally Posted by isettaman View Post
Payback can be debated at length but as I'm intending to keep the car for some years to come it's not a great issue for me.
I'll share my experience, apologies for what may end up being a shaggy dog story.

My wife and I consciously bought a Volvo when we had our two golden retriever puppies and with an intention to start a family of our own. I was impressed by the pull down child seat in the middle rear but figured we'd never get around to using that as we hadn't even spawned sprog mk1 by that time and it was going to be have to be some years before being old enough to sit in that seat.

We loved the Volvo for everything that it did, comfort, space, equipment etc. The *only* bug bear started to become that of fuel economy and at around 28mpg was starting to get towards the "How much?!" at the filling pump.

The car had done 112,000 miles (bought at 60,000 miles, 4 years old at the time) and at such a "high" mileage I wondered about the merits of getting it done but we went ahead anyway on the basis that as others have said, if you do the miles for the ROI and then a bit more, you have at least saved something. The rationale was that the car had always been well maintained, everything worked and had always been kept working. The interior was still excellent, it was just that mileage.

To solve this problem would have meant changing a perfectly good car that we were already happy with, just to essentially swap to a diesel Volvo at the time and this would have cost more than the conversion and to then change to a car of unknown personal history, so that was the driving factor.

We had a few problems, the EML came on but that was just a "burp" at LPG changeover so no big issue. The next problem was that of the system itself. The LPG injectors of the type were supposed to be serviced with a kit that became unavailable and this lifetime was described as, forgive my memory here but I think each 10,000 miles? The parts were cheap...but became obsolete.

The pleasure of more than halving that fuel cost though was sweet and the EEPMPG (Effective Equivalent Petrol MPG - I just made this up by the way) came to about 56 vs the old 28.

The story doesn't end there though, to our surprise, not only did we get to put sprog mk1 through the built in child seat but then also sprog mk2. Sprog mk1 is now nearly 20 years old and sprog mk2 17.

The story still doesn't end there...we still have the car. It is a 1994 850, which was converted in early 2000's and of much newer cars on the drive is still the one of choice for the children as it is the most comfortable for them.

It's not the fastest, it's not the most sporty of the cars on the drive but, as a lowly underpowered 2.0 non turbo, it does nothing exceptionally but everything perfectly and because of its age, it has acquired the expected dings and scrapes but that makes it the perfect, cheap to run, go-to car to put in supermarket car parks and is presently sitting in Heathrow car park on yet another airport run.

I get 45p per mile so it's a nice little earner and given that I can do a routine service that costs next to nothing and depreciation is absolutely zero. In fact, the conversation with the insurance agent this year went along the lines of:-

"What's the current value of the car?"

To which my response was "Do you want me to base that on it having new tyres and a full tank of fuel or not?"

In the next month it'll turn 300,000 miles, of which other than the first 112,000 the majority of the rest will have been on LPG and only on the second set of LPG injectors. They will die at one point but i'll tackle that when it comes to it. Other than this, the only LPG related problems are the EML which I can just clear prior to an MOT. It's always the same issue triggered by an LPG changeover burp so i'm not fussed and along the way, a couple of vacuum leaks (one being a broken PCV hard pipe) and that causes the LPG to erroneously switch back from LPG to petrol but that's not even an LPG problem.

This Volvo is as much as one of the family as any of us, the dogs have long since departed and i'm working on trying to get rid of the children, shame the wife keeps feeding them, i'm sure it encourages them to keep coming home.

I'd say, do what makes you happy but if you plan on keeping the car as we have then go for it.
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