Mazzola: The "gray area" of the regulations is what is permitted.

      Former Ferrari engineer Luigi Mazzola sees nothing illegal in the actions of the Mercedes and Red Bull engine crews, who were able to raise the compression ratio in the internal combustion engines without breaking any rules.

      In accordance with current FIA procedures the compression ratio is measured statically at ambient temperature, and everything else Mazzola considers an engineers' ingenuity.

      Luigi Mazzola: "It is important to understand that the 'grey area' of the regulations is something that does not break the rules, and therefore is permitted. No one will intentionally break the rules; in that case you will certainly be disqualified. The 'grey area' itself is legal, and I'm happy for everyone who can find some new solution and use it effectively.

      The regulations state that the measurement is taken at normal ambient temperature, and if there are no violations under those conditions, then everything is fair.

      The rules seriously restrict engineers' freedom, but the more restrictions there are, the more you find yourself in an almost impossible situation that's hard to get out of. I do not consider this a violation; on the contrary — credit to them for being able to come up with it and implement it."