The pilot and pilot-rated passenger reported that while in cruise flight, both engines experienced a partial loss of power. The pilot selected an open field and conducted a forced landing. Due to rough terrain, the airplane sustained substantial damage to the wings and fuselage.

The pilot stated that the reason for the loss of engine power was due to fuel exhaustion, as he did not verify fuel quantity prior to departure. The pilot requested his local fixed base operator to fill his main fuel tanks, which did not occur. The pilot stated that he should not have assumed the fueling had occurred.

The pilot reported no preaccident mechanical malfunctions or failures with the airplane that would have precluded normal operation.