So this is how the scenario goes. Its night time, your miles from and town and your driving alone. Suddenly the low fuel light comes on, you smack your forehead. "How could I have let this happen," you yell. Now though, you are faced with two options to get you as close to the nearest town as possible. Scenario 1) You give your Terrain the beans and unleash all 260 whatever horsepower of your V6 (or I'm not sure how much the I4 has) and crank it up to 150 km/h (writing that reminded me of a Sienfield episode). Your logic is that yes you may be operating at a higher RPM but your engine wont be running for nearly as long so it will be the most fuel efficient speed. Scenario 2) you bring it down to 40 km/h so as to keep the RPMs very low, you might be driving longer but atleast you wont be using a lot of fuel. Now clearly neither one of those it the correct answer, they are both the two extremes. The most fuel efficient speed will be somewhere in the middle. My question is what is that speed. I suppose the V6 and the I4 would have a different most fuel efficient speed as well. Any opinions or comments would be great to hear. If your not a member of the forum and just viewing this as a guest then join and post a response.. it takes two seconds.