The 'LPG Causes Breakdowns' legend has been circulating for YEARS!
Stuff has a higher octane than petrol so can stand more advance and a weaker mixture without knock, while it has a burn initiation, basically it dont go 'bang' as quick as petrol.
So you get a more even pressure through the power stroke, rather than a big hammer blow right at the top.
Actual combustion temperatures of different fuels are pretty irrelevent to running temperature, as its the localised 'hot-spots' that do damage, and how well the water jacket can soak up the heat.
Means its swings and roundabouts; you may get some higher localised temperatures in the combustion chamber with LPG, but releasing its energy more slowly over the combustion stroke, cooling system has a better chance of soaking that heat up.
Petrol may burn cooler, but dumping it all in a much shorter space of time, is just as likely to create localised hot spots, but certain to give the cooling system a harder time soaking them up!
But there are so many reports of 'problems' on RV8 engines of all types, and SO many pottential causes, blaming LPG as being at the 'root' of 'so many of them' is as fatiouse as those other rumours that say you shouldn't use super-market petrol, becouse its not the same quality as premium brands!
In fact,. that old 'gem' actually probably has more tangible evidence to support it than critasism of LPG!
REALLY it doesn't make much if any odds......
And the bottom line is; on a 15mpg mota, doing an 'average' 12K miles a year, on petrol, your fuel bill will be somethong like, three and a half grand, if you stick to petrol.
(Worth noting that; do average miles in a Rangie and you'll spend more on FUEL in a year than the car probably cost!)
Use Gas, and your annual fuel bill would probably drop to something like £2K, a saving of £1,500 a year, or enough to replace the engine with one from a scrapper three times...... saving in TWO years would buy you a complete new car!
On a car over ten years old, in the tail of its life, where mechanical maledies are as likely to be brought on by age, wear and tear, neglect, and historical abuse, as much as anything...... is it really worth worrying about some 'suggested' added risk running on gas, when the stuff can save you the cost of buying another one, in the time its likely to last anyway, whichever fuel you use?
