I always like to also relate to those who consider themselves to be "performance minded".
Ask the question, "What is performance?" When we're dealing with cars, is this how fast it goes? How well it handles corners? How quickly it can accelerate? All of those are going to be standard on the car regardless of who is driving because those are the results of the construction of the car. You could mention bolt-on performance if you want. Depends on the audience whether or not they might be offended by that.**
Then bring up the point of what about the driver? Is performance a measure of the car or the driver behind the wheel? When we're talking about efficiency, fuel-economy, hypermiling, ecomodding, or whatever name you want to give it, THAT type of performance comes down to the driver, I think (of course, some car engines are more efficient than others). Then you can really dive off into the gaming aspect of it as some people have wonderfully and skillfully posted above me.
Separate from hypermiling, on aero-mods (all of our underpanels, airdams, lowering, diffusers, boattails, spoilers, etc), I like to make the point that by making aero-mods, my engine works less than the same car without aero-mods, and thus can put out more power and speed going forward instead of wasting that power fighting the air resistance created by increased speeds. Or as I like to say, more bang for your boooooooost! (my car has a tiny turbo lol)
Hope you didn't bite off more than you can chew and spit out in 4 - 6 minutes!!
**My disclaimer: yes, of course, driving at high speeds and not crashing (assuming no outside factors) requires great skill (performance) of the driver and the car. The car has to have the parts to go super fast and the driver must have the skills to "perform" at such speeds.