Found another way to save on gas.

[Matt Timion]

Originally Posted by SVOboy

So, you're saying that we should speed to keep up with everyone else then? If you wanna play the safety game you can get all sorts of data about reaction times and safety as you go from 65 to 80 mph, not to mention the fact that most cops will not let you off speeding 15 mph unless they also enjoy spending their time cleaning up after crashes.

ACtually, in Southern California (where Compaq888 lives) they do. 80mph is normal "flow of traffic." The only people going 65mph are the semis.

His initial question however is valid. Did Compaq888 take measurements and determine the actual increase of his tires and make a calculation (or even a regression line) determining how much his speedometer was off, or was his change in speed all based on gut feeling?