4gmp, ok thats low, but not near as bad as 4mpg...
Ok, after a few pints and spending most of my controlling life behind a bar, than a wheel, and cuurently having a fre brews too nany in brum UK, The worst equivalent milage per unit I myself have suffered is 15mpl, and thats oold twostrok oil not petrol....
I fist steered and dented a Morris Minor at age 4; my dad did the engine, clutch gears and brakes then, and a MK2 Escort Estate 1.2L at 17 under supervision (it was my dads). Also driven a for less than a few 1000 kms, a Peugot 102, to learn and pass my test in, also a VW Golf 1.4L, a Vauxhall (UK biult and spec Opel/GM) Vectera 2L HiFi Estate, and at least 3000+km between Opel Vecteras (2003 to 2005 2.2L DI a 2L Turbo Estate-Finn spec) Peugot 207 (2006-Finn spec) in Finland.
But apart from whence I was in Finland, - Hyvaa Suomilainen, sinut parras rockia joo!
I have riden more milage in the UK on 2 wheels riding a... 1967 BSA D7 Bantam, an late 80's Yamaha RD125, a knackered Honda C90 1984 Suzuki GTX250E (twin cylinder baby Katana [not the 90's Japanese/Grey Market 4 cyl real baby Katana], little brother to the GSX400, forerunner to the GS500 'Goose',) and Honda Sky (big wheeled moped) excluding being on/in the back of many bikes and cars going somewhat fster than legally approved or not in a controlled forward direction.