- Thread starter
- Staff
- #561
- 55,985
- 23,962
97 octane in the r18 engine???? Run your next tank on 87 and drive the same way and report your mileage. Then do a comparison on cost for 87 vs 97. There is no way you are getting ahead on thatMy lifetime average is 39.9US MPG(5.895 L/HK or 16.96km/L) over the past 9,961.5 miles(16,031.4KM)since I bought it. It's a 2015 EX with CVT. I use a scanguage to get the most of my fuel. I drive about 60% highway. I also installed US model HF wheels for less drag. Live in southern Ontario. Love this car. I only run Exxon/Mobil/Esso 97 octane as it seems to give me better fuel economy than many others I've tried (BP/Shell/PetroCan/Pilot)