Opposed, it depends how fast you travel on the highway and if you're drafting or not. Without any other cars around, on a flat surface and windows up you cannot do any better than 26-27 mpg when cruising at 80 mph. Just not possible. On the flip side when traveling in a pack of cars going 80-90 I've gotten 33 mpg out of a tank.
KevinDuMa, that S2000 looks super clean. May I kindly suggest that you get a paint protection kit (clear bra) installed on the front of your car? Doesn't take much more than 1-2 years for the front of that poor car to be all scratched up from road debris
Here are 2 pics of mine from the last track event I attended:
in the paddock next to my buddy's 350Z
Action shot with a 911 that I "battled" with for several sessions (I ultimately passed him).
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Current: 2023 GRC Circuit Edition, 2012 C63 AMG P31
Past: (2) 2000 MR2 Spyder, 2017 GTI Sport, 2006 Porsche Cayman S, Supercharged 2013 BRZ-L, 2007 Honda S2000, 1992 Integra GS-R