At a circuit that should have suited Hunt's car, the Texaco fuel McLaren were using was tested and although apparently legal, their cars, and those of the Penske team, were judged to contain a higher octane level than allowed.
Nun circuíto perfecto para o coche de Hunt, o combustible Texaco que utilizaba McLaren foi examinado e aínda que aparentemente legal, os seus coches e tamén os do equipo Penske, foron xulgados por conter un nivel de octanaxe máis alto que o permitido.