Browsing ebay, as we all do, I spotted something pretty interesting which could be used as an auxiliary/emergency fuel tank on a 120. BMW E30 M3s often came with an auxiliary long range petrol tank of about 15l. The size and shape of the tank looks like it would fit nicely along the chassis rails of an LC so I thought I'd pick one up. It allegedly comes with an integrated pump. My idea is that, with the pump, and a 3 way switch, it can be used to transfer diesel into/out of the main tank. I'll need help with sorting it out so may call upon some of you skilled people on here. If it's a no go I'm sure it will be easy to sell on as these are often listed on ebay for over £100 (I'm not paying that much for the one I got). Any thoughts, ideas, comments. If you categorically think it can't happen (or is some way not legal) please let me know. This is what it looks like fitted to a BMW. Diagram for original fitting.