i looked at a sheet that i got with my fuel and it states rated octane 114 and the pump octane 107. what is the real octane. its citgo fuel.

 

There are 2 different ratings for a fuel. The pump number is the average of the two, so your gas is probably 107.

 

There should be a Research Octane Number(RON) and a Motor Octane Number(MON). Most pump gas is figured using the Anti-Knock Index, which is (R+M)/2. R=Research Octane Number and M=Motor Octane Number.

Example:
Research Octane Number:115
Motor Octane Number:106

(R+M)/2 so (115+106)/2 = 221/2 = 110.5 rounds up 111 octane