Bodmin Moor, early '70's, Whirlwind on SAR from Chivenor. Weather dog, as usual. "Hmm" says Bob Jones "Getting a bit low on the go-juice". "Ah" says Kip the crewman "Just passed a garage". "OK" says Bob "We'll land on and see if they have Pink Paraffin". They do. Hover taxy in to the pump and 'Bob's your Uncle'.
Bit smoky, but it does the trick.
Buggers wouldn't pass on the Green Shield Stamps though.