From ages back I can still remember the smell of the Prentice - mainly what we then didn't call Avgas, probably leaking from the fuel cock below the instrument panel (if that's where it was). That smell was one of the major factors in working to pass BasicTraining and get on to the Harvard, which had that comforting smell of warm oil among other advantages, like being a real aeroplane.
Oddly, I don't remember the smell of various other aircraft Her Maj was pleased to give me to play about with for 16 years. But that petrol smell of the Pregnant Duck lingers on ... Talk about Memory Lane ...
PS However, the smell in the greenish smoke cloud after a starter cartridge seal failure on a Venom 1's Ghost was summat else (but that's probably thread drift, as it wasn't the smell of the Venom itself and after a very quick winding forward of the canopy handle, with luck stayed outside - 100% oxygen -selected with the other (right) hand - helped too, IIRC).