No he didn't, the LMP rules were changed so that the only regulation regarding the engine is the amount of energy allowed per lap. Since engines are free, this would (in theory) allow F1 engines, but it most likely won't happen, since LMP engines will generally have to be integrated with far more powerful energy recovery systems than in F1 (the maximum storeable energy for 2014 LMPs is probably about 15 times the one currently allowed in KERS in F1). And they'll have to be able to run over 5000 km in one go.
Allow me to interpret the rules slightly different. The amount of fuel per lap is controlled by the same technology as the fuel rate in F1 and the fuel rates are quite similar considering the different style of racing. The objective is the same. They want to significantly drop the fuel utilization. And F1 will also get much bigger energy recovery in 2014 according to the plan. Most observers have noticed that the FiA was behind those similarities which will help to bring both top racing series closer in technology. That can only help to involve more manufacturers in both series because it will become easier to switch between the two series to suit the particular manufacturers marketing needs.
Maybe that could depend on how much more money the FIA gets paid by FOM.
Maybe, but I take that as a red herring by Ecclestone. Money is another issue which is not likely to influence the question of sustainability at the FiA. The issue simply has top priority for the federation.
Ever wondered why anyone would want Formula 1 engines to be used in Le Mans? If Formula 1 engines are used in Le Mans then that weakens the strength of the F1 trademark since it could cause confusion.
I have covered that issue above. The FiA are not primarily concerned about the commercial value. Ecclestone is because he wants to keep his pinnacle moniker. But he forgets that he his on the best way to loose the status in some years with the old technology that is employed in the V8s.
Now who is it who owns the F1 trademark.....?
The FiA does through the ownership of the FiA Formula 1 world championship. Ecclestone's employer just owns the right to exploit it for 100 years.