[Dutton]

In the context of having a spec engine formula, this situation is certainly the best option. At least the teams can still run with their own designs, albeit performance limited. I read the parity comment to mean parity with the standard unit, as opposed to current relative parity between the present engines.

I guess it will drive the teams which continue with their own designs to focus on designing their engines on the basis of gaining superior fuel economy to the spec units? Since, theoretically, they are not going to be able to have anything that produces a mentionable performance advantage, working to use less fuel for the same performance would seem to be about the only worthwhile thing to do?