Both of 4-stroke engines that are heavier than the Deltahawk 2-stroke engine. But Jet fuel, like diesel fuel, has sufficient lubricity so as not to require adding oil to the fuel fix as used in gasoline powered 2-stroke engines.
The WWI era rotary engines,like used on the Fokker Triplane, used caster oil in the fuel mix so most of the pilots had chronic diarrhea! Poor Red Baron!!!Cessna Introduces Jet-A Skylane
By Stephen Pope / Published: Jul 23, 2012
Cessna Aircraft unveiled a Jet-A version of the venerable Skylane at Oshkosh on Monday, an airplane that will boost the 182’s max speed to 155 knots, high-speed range to 1,160 nautical miles and certified ceiling to 20,000 feet, all while burning just 11 gallons of jet fuel per hour.
The new model, called the Turbo 182 NXT, will be equipped with a 230-horsepower diesel engine from French manufacturer SMA Safran.
Read more at http://www.flyingmag.com/aircraft/pistons/ces...
See, I know my aviation!