AIR TAXI PLT NOTICES AFTER TKOF THAT ACFT NOT REFUELED AS REQUESTED. UNABLE DIVERT NEXT ARPT DUE WX. DIVERTED ABQ; L ENG QUIT AS TURNED OFF RWY.

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FUEL LOAD WAS REQUESTED FROM FBO OKLAHOMA 45 MINS PRIOR TO DISPATCH TIME. ALSO APU TO BE STARTED FOR AIR CONDITIONER 15 MINS PRIOR TO DISPATCH. PAX WERE SLIGHTLY LATE AND FOUND APU TO BE INOP. AIR SHOW WAS STARTING; APU DID NOT WORK AND AFTER LOADING PAX; FBO LINE CREW PULLED UP IN FRONT OF AIRPLANE WITH NEW APU. AFTER DELAY; START WAS MADE. BY THEN W RWY WAS CLOSED AND HAD A 1 1/2-2 MI TAXI. AFTER TKOF WAS RTED AROUND AIR SHOW; THEN AT ALT ENTERED IFR; WAS GETTING MODERATE TURB AND ICE. THEN FIRST NOTICED FBO HAD NOT ADDED FUEL. RADIO CALL CONFIRMED. BY THIS TIME I WAS TOLD THERE WAS TORNADO 30 MI N OF AMA. I MADE A JUDGEMENT TO DIVERT TO ABQ FOR FUEL. LATER CTR ADVISED BEST RTE WAS S TO CORONA AND CLRED ME DIRECT CORONA DIRECT ABQ. AT THIS TIME I SAW NO PROBLEM. AT 23 DME TO ABQ FUEL GAUGES SHOWED OVER 15 GALLONS EACH SIDE; AT 18 KM GAUGES SHOWED 8 GALLONS EACH SIDE AND I DECLARED AN EMER; LANDED; TURNED OFF; THEN L ENG QUIT AND I CLRED TAXIWAY TO ALLOW TFC. MY PERCEPTION AND JUDGEMENT WAS FAULTY IN THAT I HAD NEVER OPERATED THE FUEL GAUGES IN THAT AREA. THE OVERLOAD OF AIR SHOW; FUEL; LATE PAX; APU FAULTY AFFECTED MY JUDGEMENT IN NOT DOING A CHK; CHK; CHK; THEN NOT RETURNING FOR FUEL. BY AMA I COULD NOT LAND DUE TO WX; DID NOT ASK FOR OTHER REFUEL. BY THE GAUGES W OF AMA I HAD PLENTY OF FUEL. THE WX DIVERSION WELL S AND FUEL GAUGE USE WAS TOTALLY UNEXPECTED. A LESSON WELL LEARNED AND FEEL TO BE VERY FORTUNATE.