Quote:
Originally Posted by rngr4142
...i have a 1995 ford ranger 4x4 with the 3.0v6 auto. o/d. this engine turns at a whopping 2500 RPM when at 60 MPH...
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In my 2013 Honda Fit with manual 5-speed, cruising at 100 km/h (62mph) - which is the legal speed limit here - makes the little 1.5 L engine spin at 3,000 RPM. If I drive consistently at this speed, slow down a bit as climbing hills, and coast downhill, I can easily hit 40-45 mpg over an 1 hour drive.
My point is that RPM's aren't everything. If you have an instant fuel consumption display, it becomes very clear that fuel consumption depends on the load more than RPM's. I could be wrong, but I think engine load is affected by many factors such as grade/slope of road, air temperature, wind speed and direction, weight of car and all the stuff in your trunk, type of transmission, 4x4 drive, tires (type and pressure of tire), drag forces / aero of your car, type of engine oil, etc...and of course how many cheeseburgers you had that day.
