Well during that same time we had Skidders with Duetz 5 cylinders and the same machines with Detroits , the duetz were much better on fuel , but longevity was horrid. Constantly replacing cylinders and heads. Just put fuel in the Scream'n Jimmies!! And the 2 Deeres' we had out pulled, out turned, all of them ! The Cats that a buddy ran are still running !!! The Timberjacks were rugged, but turned horrible, were loud as h**!! and just as cold ! The Tree Farmers with the Deutz's were a little better , but engine issues were off the charts. Ditched them for Deere and never looked back.. Deeres' were AWSOME on fuel too !! thier powershift trans was nothing short of awsome! The lack of a torqueconverter made the very efficient ! Now the new ones almost all have a converter, and are not nearly as efficent.