Re: 98 MPG in a 5 min slot!
Please be careful when suggesting that lots of regeneration stars are good! The car is boasting that it has recovered some of the braking energy, which is good. But, for every 50kW hour of regenerated energy there is also energy, probably more, that was wasted as heat. When you have to slow down, as we all must, it's nice to get a star. But if you could drive so as not to get any stars at all, you'd be doing better still!
Also, I personally can't see how the tires would be increasing your regeneration. I get more regeneration on my commute on the days when all the lights are against me.