Sweet spot at 75?
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On a recent 500 miles trip, I noticed that our RX 400h was more fuel efficient at 75 mph (24 mpg) than at 65 or 70 mph (22 mpg). This wasn't a fluke, I could repeat the experiment consistently and my wife confirms she observed the same.
Have you guys noticed the same thing?
Have you guys noticed the same thing?
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It is not even possible to get better mileage at a higher speed. It takes more energy to go 5-10 mph faster and there is limited energy/horsepower from the battery and electric motors. The gas engine clearly has to work harder at faster speeds which equates to poorer mileage. There is no free lunch.
My mileage goes down dramatically above 65 mph although I can still get 24 mpg at 70-75 mph. I can easily get above this at 55-65 mph with good technique.
My mileage goes down dramatically above 65 mph although I can still get 24 mpg at 70-75 mph. I can easily get above this at 55-65 mph with good technique.
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It is not even possible to get better mileage at a higher speed. It takes more energy to go 5-10 mph faster and there is limited energy/horsepower from the battery and electric motors. The gas engine clearly has to work harder at faster speeds which equates to poorer mileage. There is no free lunch.
My mileage goes down dramatically above 65 mph although I can still get 24 mpg at 70-75 mph. I can easily get above this at 55-65 mph with good technique.
My mileage goes down dramatically above 65 mph although I can still get 24 mpg at 70-75 mph. I can easily get above this at 55-65 mph with good technique.
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I would wonder if there is something wrong with your vehicle. The problem you are having is that you are only getting 22mpg at 65 mph. That is really low. Mine gets 26-27mpg at 65 mph but then it goes down dramatically at faster speeds. Your reading of 24 mpg at 75 mph is probably similiar to mine.
About a week ago I towed my 1800 lb boat for a couple hundred miles on the freeway at about 65 mph and I still got about 20-21 mpg.
About a week ago I towed my 1800 lb boat for a couple hundred miles on the freeway at about 65 mph and I still got about 20-21 mpg.
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recently completed 1500 mile trip in new RX400h (700 miles on odometer when trip was started). Did lots of mountain driving and tried to go 67-70 MPH when permitted. Averaged 26.7 MPG for the entire trip. Quite a bit of weight in vehicle too.
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I did meet someone at the grocery that had 60,000 on his 08 h and was getting 28 on trips and about 29 average. I don't know his driving patterns.
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