To get more FE...drive faster?

[omgwtfbyobbq]

Originally Posted by mrmad

As I stated in my earlier post, I have consistent runs with little variation over thousands of miles and am getting about the same mpg at an average of 75mph as I was at 65mph. This is about as stable results as we can get in real world driving. Your response was I was not getting consistent runs due to differences in traffic/weather etc. If this is the case then we should be disputing nearly every mpg claim on this site.

The difference is, our mpg claims aren't comparisons. They're just claims. We all deal with different traffic and road conditions in different vehicles. What you're claiming is that going 65mph compared to 75mph doesn't produce a difference in mileage, which it may not for you because of your driving habits, conditions, vehicle, etc... But it does in every single controlled test I've seen. It's tantamount to someone who drives nothing but highway saying that killing the engine at idle doesn't increase mileage. Sure, it may not increase mileage for them because they seldom idle, but it does compared to idling, and if a driver idles enough, they'll see an increase.

If you really want to test it, I have some great two lane low traffic roads up here we can do bidirectional runs on. All you need is yerself, yer car, and a SM. Until then, because every mileage/speed test I've ever seen, and every BSFC map compared to glider/gearing indicates that mileage will drop as highway speed in top gear increases, I don't believe your assertion that your car shows no drop in mileage from 75mpg to 65mph. It may show no drop for you due to your driving conditions, but unless you test it w/o confounds, no way meng, Iyam a skeptic.