Caubet claims that as well as the road car relevance issue with the move to four-cylinder 1.6-litre engines, any alteration to the rule change plans will lead to credibility issues for Renault's senior management.
When asked if Renault would pull out of F1 as an engine manufacturer if the 2013 rules are delayed, Caubet said: "The problem to delay is that in Renault if you say, okay, the new engine will arrive in 2015, then the credibility will be zero. That is a key point.
"When you are changing like that each day, you can explain to the board that in December the new engine will be like that, and the following November it is 2015. The key point is credibility - and, as I said, we are in the red zone.