I’m unsure but i heard that both Red Bull cars have had an engine switched out for another for a precautionary check but it turned out to be a sensor fault, so they might still have another in hand with low km’s on it. Can’t confirm this, just read about it a month ago on one of the many sites i trawl through, lol.

Absolutely zblkhwk! Heidfeld has a very smooth driving style, not unlike Jenson Button.People say Heidfeld will never make it to the top because he lacks that “killer” instinct.But I never thought Button had this quality either and look where he is now.I would love to see those two go up against one another in the same cars.

I also find it interesting that both Red Bull’s have used five engines, which tells me that they will have to start tuning down or face the 10 grid penalty at some point. That puts them in a tough fight with Braun who seem to be doing everything right.

well, red bulls used their 5th engine at Silverstone, but they only used their 4th once, in Turkey. Looks like tactical move, they will very likely put that 4th engine back into the car for one more race at least. So there may not be that much difference between Brawn and Red Bull when it comes to engine mileage.

http://www.f1wolf.com/2009-season

Torro Rosso have apparently being pushing the limits of the engines on request from Ferrari as well, seeing how far they will go before they lose power and start to fade.

there have been rumours about this, who knows, everything is possible. on the other hand, when the team mates take each other out in the first corner of the race they do save enough mileage to perhaps safely run the same engine in one extra race

Again remembering that just cause they pulled out an engine, doesn’t mean they won’t put it back in the car again before the season is over!

that is true. some tracks are easier on engines than some others and this new rule offers the teams a way to avoid using the same engine on several hard on the engine circuits. Unfortunatelly the data released by FIA only tell who used new engine during the race weekend and how many engines that driver used previously. It does not say when each engine was used.

I also find it interesting that both Red Bull’s have used five engines, which tells me that they will have to start tuning down or face the 10 grid penalty at some point. That puts them in a tough fight with Braun who seem to be doing everything right.