By: Sebastian

Good article!
If I might add, do NOT use cruise control to improve gas mileage.
If you understand how engine vacuum works, and gravity works, then you realize that cruise control can kill those extra mpg’s. This is mostly for the people that want to squeeze that extra 2-3 miles per gallon. If you like comfort ability then just skip this one.
By leaving your foot stationary on the accelerator after you’ve reached your desired speed, can save you good mileage on long freeway trips. Your vacuum and throttle positioning will remain the same, thus making the ECU/ECM not have to compensate for low vacuum when you’re going up even on a slight angle (say a tiny gradual increase on the road). The drawback is that you will slow down in speed, usually from 2-5 mph. You will eventually resume to the desired speed. You might also increase speed in a down slope, but you can always take your foot of the gas to engine break a bit. I’ve done this many times on road trips. Recently my greatest success with this method was a 4 hour trip on a 2012 chrysler 200 (avg. “claim” 31mpg HWY). It took me 15 minutes longer to get to Houston, TX, then I would have with cruise control. Even though it took me a bit longer I managed to average 36.8mpg! I’ve done this with my old civic plenty of times getting up to 43mpg 🙂
Anyways, that’s a quick tip from the many that are out there…