There seems to be some discussion about what is going to happen to F1 engines after the failure (?) of the current V6 formula. The point of the current hybrid systems was to make F1 more relevant to how car technology is developing, even super cars such as the new Ferrari, Porsche and McLaren machines use combination energy systems not just internal combustion engines, so hybrid technology (like it or not) is going to be with us to push the date we run out of oil a little bit into the future. So what could F1 do to make the power train a "bit more F1" but be relevant to how modern car technology is developing? V12 screamers are almost certainly out but could or should F1 go down the same road as the WEC and allow alternative fuels such as diesel or LPG? If you don't like the sound of today's F1 cars I'm not sure you will like a grid of 22 common rail diesel engines all winding themselves up to 4,000 rpm just before the red lights go out. Fuel flow formulas, air flow formulas, turbo, super charged, 5 stroke, 6 stroke; all this technology has been developed and is available to F1 engine builders. Here's a rough summary of what the WEC rules do for engine tech: 2014 power train – Power restricted by fuel flow – No limit in air restrictor, boost pressure and engine capacity – Instant fuel flow is controlled, not global amount of fuel : no strategy in fuel economy, cars and drivers must go at full performance – Amount of energy (fuel) adjusted vs Hybrid system power – All other new technology is potentially eligible under the condition it can be controlled, balanced, and road relevant (ex : electric car, hydrogen, 2 stroke engine) So, Ferrari don't make 4 cylinder engines but all the other manufacturers in F1 make some pretty good ones. What should F1 do? Create another spec series engines as the powers that be did last time or let the engine developers go about what they do best, designing different engines.