Aviation gasoline must be free from suspended water and sediment and have an appropriate octane reading and color.

1. (1) Octane rating. There are three different classifications of aviation gasoline:

   1. (A) Grade 80-87. The lean octane rating must not be less than 80. The rich octane rating must not be less than 87.
   2. (B) Grade 100-130. The lean octane rating must not be less than 100. The rich octane rating must not be less than 130.
   3. (C) Grade 100-130LL. The lean octane rating must not be less than 100. The rich octane rating must not be less than 130.

2. (2) Aviation gasoline color.

   1. (A) Grade 80-87 must have a red color.
   2. (B) Grade 100-130 must have a green color.
   3. (C) Grade 100-130LL must have a blue color.

Amended at 18 Ok Reg 1052, eff 5-11-01

Amended at 32 Ok Reg 768, eff 8-27-15