1978 world champion Mario Andretti has joined the calls for Formula One to reconsider its engine plans for 2013.
Mercedes' Ross Brawn and Sauber's Monisha Kaltenborn admitted last week that a "debate" is raging behind the scenes about whether the sport should as scheduled drop its current 2.4 litre V8 engine regulations after next year.
"I agree with Bernie Ecclestone (in) not liking the proposed 4-cylinder turbo engine formula for 2013," Andretti wrote on Twitter. "Booring!!"
It is believed Ferrari is also opposed to the 2013 rules, which have been championed by the famous Italian team's former boss Jean Todt, who is now FIA president.
Curiously, Ferrari revealed that Frenchman Todt visited the team's Maranello headquarters on Wednesday, meeting with president Luca di Montezemolo.