1990 Ford F350 with the IDI 7.3L and Hypermax turbo kit
1992 IH 4700 Dump Truck, with the big 466DT engine
John Deere 4320 Compact Tractor, with a JD turbo 4 cyl
Kubota Utility tractor, with a 3.3L non-turbo 4 cyl
Kubota RTV, with a cute little 3 cyl
John Deere GT230 garden tractor, with a cute little 3 cyl Yanmar
I've also owned a couple Mercedes-Benz diesels, a 240D and a 300SD (W115 and W126 cars), an '82 Toyota pickup 2.2L diesel, an '84 Toyota Corolla with a 1.8L diesel, and an '84 Chevette with a 1.8L (I think?) Isuzu diesel, and an '84 Ford Ranger with a 2.2L Mazda diesel.
I've also owned quite a few VAG diesels over the years.