There is an error in that Shell info sheet. The method is ASTM D 909, not 910
The Shell sheet is correct, ASTM D909 merely gives the rich mixture knock value, the overarching spec is ASTM D910. The 910 specification does not include all gasoline satisfactory for reciprocating aviation engines, but rather, defines the following specific types of aviation gasoline for civil use: Grade 80; Grade 91; Grade 100; and Grade 100LL. The gasoline shall adhere to octane rating requirements specified for individual grades, as follows: lean mixture knock value (motor octane number and aviation lean rating); rich mixture knock value (octane and performance number); tetraethyl lead content; color; and dye content (blue, yellow, red, and orange). Conversely, the gasoline shall meet the following requirements specified for all grades: density; distillation (initial and final boiling points, fuel evaporated, evaporated temperatures); recovery, residue, and loss volume; vapor pressure; freezing point; sulfur content; net heat of combustion; copper strip corrosion; oxidation stability (potential gum and lead precipitate); volume change during water reaction; and electrical conductivity. The following sub part requirements,
Test specification for aviation gasoline: ASTM D910
Avgas fuel test: ASTM tests:
Motor Octane Number ASTM D2700 Aviation Lean Rating ASTM D2700 Performance Number (Super-Charge) ASTM D909 Tetraethyl Lead ASTM D5059 Color ASTM D2392 Density ASTM D4052 Distillation ASTM D86 Vapor Pressure ASTM D5191 Freezing Point ASTM D2386 Sulfur ASTM D2622 Net Heat of Combustion ASTM D3338 Copper Corrosion ASTM D130 Oxidation Stability - Potential Gum ASTM D873 Oxidation Stability - Lead Precipitate ASTM D873 Water Reaction - Volume change ASTM D1094 Electrical Conductivity ASTM D2624
