Hello MetroMPG, They seem to roll the same but I have lost about 1.7 mpg and this car is no comparison to the 2002 insight I have.I run 40psi in these tires and the insight RE92s I run 45psi, both cars are automatic transmission and my through em in neutral test on the hill by my house is how I compare them. Even on the ensaves I noticed no coasting difference.