lexisus new commerical is stupid..

[Weltall]

If this Lexus engine is designed to operate with x efficiency per stroke, as opposed to an engine of equal size, weight and power which averages y efficiency per stroke, given that both engines will be fundamentally similar (in that they operate via combustion from a given set of liquid fuel sources), would not the efficiency of the Lexus engine, by dint of its design, be 'optimized' for any fuel which could theoretically ignite within an internal combustion engine compared to other, similar but presumably less-efficient, models of internal combustion engine, assuming both ran on the same fuel source? Especially when compared with a non-hybrid?

It would make Lexus' claim technically true, but only as a thought exercise. In practical exercise, it's specious at best.