You can cut it with gasoline for a higher concentration of hydraulic oil. Make sure the oil is new or filtered well. My 300SD will run on 80% WMO and 20 gasoline pretty well. If you get prechamber coking, advance your timing a few degrees.

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1991 F250 super-cab 7.3 IDI. (rebuilt by me) Banks Sidewinder turbo, hydroboost brakes, new IP and injectors.
2003 S430 - 107K
1983 300SD - Tanoshii - mostly restored ~400K+.
1983 300SD - Good interior. Engine finally tamed ~250K.
Monark Nozzle Install Video - http://tinyurl.com/ptd2tge