On December 28, 2018, about 2015 central standard time, a Cessna 152 airplane, N6202M, impacted terrain after a loss of engine power en route to Kelly Field Airport (KSKF), San Antonio, Texas. The pilot and one passenger received minor injuries, and the airplane was substantially damaged during a forced landing. The airplane was registered to and operated by Flyokair, LLC, under the provisions of Title 14 Code of Federal Regulations Part 91 as personal flight. Night visual meteorological conditions prevailed at the time of the accident. The airplane departed Shawnee, Oklahoma, about 1655. The pilot reported that he had been airborne about 2 hours, and that he should reach his destination airport in about 15 minutes. About 30-45minutes later, he stated the engine started to lose power. He contacted air traffic control for vectors to the nearest airport. The pilot then looked at the gauges; oil pressure, oil temperature, and fuel gauges, which indicated the following: left fuel gauge ½ and right gauge less than ½. He added that he might have to land on the highway, since he didn't think he could make an airport. In an attempt to restore engine power, the pilot applied carburetor heat, the engine responded, and he was able to climb and gain altitude. Since the engine responded after he applied carburetor heat, he thought the engine may have experienced carburetor icing. A few minutes later, the engine lost power, and additional attempts to restore power were unsuccessful. He established a glide and picked out terrain for the forced landing. The airplane then impacted trees and terrain. The airplane recovery crew noted that the airplane was substantially damaged during the accident. The fuel tanks were empty and no evidence that fuel had leaked onto the ground. They added the fuel tanks had not been breached during the accident. On the NTSB's 6120 form, Pilot/Operator Aircraft Accident/Incident Report, under the section: Recommendation (How could this accident/incident have been prevented?). The pilot noted (in part): Better calculation and review of distance, fuel in time, and time in flight. During a follow-up conversation with a Federal Aviation Administration (FAA) inspector, the pilot did not clarify how he checked the fuel tanks before departure; however, he didn't add fuel before departure. The pilot added that he had talked with the airplane's owner and admitted he ran of fuel.