Any diesel is in theory a multifuel. The gm 6.2/6.5, ford 6.9/7.3 and early Cummins BT engines with the VE pump all had rotary injection pumps. They like diesel and only diesel or the pumps will fail in some cases. Especially if gasoline is mixed in. That covers feeding engines that will easily fit in a M715.
All of of the above listed engines can burn various ratios of oil mixed with diesel. Based on driver reports on this web site and others. 30%-50% have worked. However, one cold morning start up with thick oil in the tank could snap the IP drive shaft.
Even with small amounts of oil mixed in regularly. IP and injector failure is more likely.
The multifuel in the M35 trucks and 5 tons has pistons unique to that engine. They are the real genius along with the swirling of the fuel by the injectors behind the multifuel design. These engines will not fit in a M715 though.
Is this what you were wanting to know?