Does anyone know roughly what percentage of allied fighters used 150 octane toward the end of the war? Was the 150 octane widespread and common or just something that existed but was rarely used. What about for the axis fighters. How widespread was the C3 (or whatever it is called) used late in the war?
Any Fw190 powered by a BMW 801 engine required C3 fuel. Me109s used mostly B4 fuel. Best to take anything Kurfurst had to say with a very large pinch of salt.
As for 150 fuel,
Consumption of 150 Grade Fuel - Barrels
UK consumption North West Europe
June 1944 184,000 (25,205 tons)
July 1944 283,000 (38,767 tons)
August 1944 218,000 (29,863 tons)
September 1944 169,000 (23,150 tons)
October 1944 183,000 (25,068 tons)
November 1944 140,000 (19,178 tons)
December 1944 193,000 (26,438 tons)
January 1945 138,000 (18,904 tons) of which 15,000 (2,054 tons)
February 1945 148,000 (20,273 tons) of which 17,000 (2,328 tons
March 1945 201,000 (27,534 tons) of which 52,000 (7,123 tons)
April 1945 208,000 (28,493 tons) of which 89,000 (12,191 tons)
May 1945 49,000 (6,712 tons) of which 32,000 (4,383 tons)
UK = 8th AAF and ADGB. Northwest Europe = 2nd TAF.
Other figures.
August 1944 USAAF 182,000 (24,931 tons) RAF 49,000 (6712 tons)
October 1944 estimated USAAF 225,000 RAF 45,000
December 1944 issues USAAF 133,000 RAF 0
December 1944 exports USAAF 8,000 RAF 88,000
December 1944 issues on continent. USAAF 0 RAF 13,000
7.3 Barrels = 1 ton.
Data from POWE 33/990 33/991 33/992 33/985
http://www.wwiiaircraftperformance.org/150grade/Consumption_150_Grade_fuel_Barrels.html