A diesel engine...

[wannaduacentury]

Three-stroke 1967 Saab 9-6 that needs the oil mixed into the gasoline in precise proportions in the gas tank.

High maintainence, and a little odd...
(eh-hem, or should I say "unique")

(can't remember if the '67 was a three-stroke or a two-stroke.)

I think they are 2 stroke- We have an 87 Saab and dh always likes to look up trivia on older cars. Volvos and Mercedes too. and old Toyotas. it's a fun hobby.