Fuel efficiency

[BenMortar]

Good day fellow Jeepsters

I live in the UK where petrol / gas is currently over $9 a gallon. I am about to take posession of a 1943 MB that I am told will do about 15 miles to the gallon. So it will cost about $100 to fill the tank which will then cover 150 miles - hmmmmmmmmmmmmmmm.

My question - do you know of any after-market improvements (such as carbs or an exhaust system) that will improve the engine's inefficiency and poor fuel consumption?

Thank you for any advice.

Ben