Hi there. When LPG is used to fuel internal combustion engines. It is often referred to as
autogas. More recently, it has also been used in diesel engines. Its advantage is that it is non-toxic, non-corrosive and free of
tetraethyl lead or any additives and has a high octane rating of 108 RON. It burns cleaner than petrol or diesel and is especially free of the particuales from the latter. It sounds like the best option for your vehicle since gas prices are higher than ever, but there are two downsides. Firstly it has a lower energy density than either petrol or diesel, so the equivalent fuel consumption is higher, but since many governments impose less tax, it is still usually more cost effective. Secondly, some designs of internal combustion engine require the lubrication of petrol or diesel with lead or lead substitute, and LPG's lack, thereof, can damage valves or shorten their life. Engines designed for unleaded fuel, equipped with hardened valve seats, are suitable for use with LPG without added upper cylinder lubrication, so if you did not do this with your valves, this might be your problem.
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