Narrative:

The day started by topping off fuel. Capacity is 110 gallons. Took off and flew direct to ZZZ. Dropped off the owner of the plane at ZZZ and then flew from ZZZ toward zzzzz intersection. Once clear of class B airspace I flew direct to ZZZ1. Approximately 30 minutes into the flight the engine quit and the fuel pressure light came on. I wobbled the emergency pump but had little success. A large corn field was ahead and left and I made a pattern to land there. This type of plane is landed gear up if off airport and no hard surface. I approached the field at 90 kts and made a couple south turns to lose altitude. Once closer I noticed the field sloped downhill. The adjacent field was chosen to land in and it was straight ahead after a low area with overgrowth and a dirt road. I flew the profile of the first field to maintain speed and aimed for the start of the second field. Once the plane hit it slid for 250 ft. There was no injuries and no fire. The remaining fuel was drained from the tanks and verified the tanks did not have enough fuel to keep the engine running. The total time from the departure airport to the field was 2.7 flight hrs. I normally use 30 gph to plan. With that I should have had some reserve once at ZZZ1. In hindsight I should have refueled at ZZZ. In the future I will limit time to 2 hrs between fueling. I also feel that there could have been a loose fuel cap causing venting of fuel or the aircraft was tilted during fueling causing a lower amount of fuel to go into tanks. Once the plane is repaired the owner will drain the tanks and check the capacity by filling.

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Original NASA ASRS Text

Title: T6 Texan pilot reported an off airport landing due to fuel starvation.

Narrative: The day started by topping off fuel. Capacity is 110 gallons. Took off and flew direct to ZZZ. Dropped off the owner of the plane at ZZZ and then flew from ZZZ toward ZZZZZ Intersection. Once clear of Class B airspace I flew direct to ZZZ1. Approximately 30 minutes into the flight the engine quit and the fuel pressure light came on. I wobbled the emergency pump but had little success. A large corn field was ahead and left and I made a pattern to land there. This type of plane is landed gear up if off airport and no hard surface. I approached the field at 90 kts and made a couple S turns to lose altitude. Once closer I noticed the field sloped downhill. The adjacent field was chosen to land in and it was straight ahead after a low area with overgrowth and a dirt road. I flew the profile of the first field to maintain speed and aimed for the start of the second field. Once the plane hit it slid for 250 ft. There was no injuries and no fire. The remaining fuel was drained from the tanks and verified the tanks did not have enough fuel to keep the engine running. The total time from the departure airport to the field was 2.7 flight hrs. I normally use 30 GPH to plan. With that I should have had some reserve once at ZZZ1. In hindsight I should have refueled at ZZZ. In the future I will limit time to 2 hrs between fueling. I also feel that there could have been a loose fuel cap causing venting of fuel or the aircraft was tilted during fueling causing a lower amount of fuel to go into tanks. Once the plane is repaired the owner will drain the tanks and check the capacity by filling.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.