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Saw a 23 May 2014 TopGear post by Vijay Pattni which says that "NX 300h fuel economy targeted at 54.3 mpg. That's "prius performance" and seems highly unlikely (or a miss print ?). ES 300h fuel Economy in the 40 mpg range seems more likely.
 

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Saw a 23 May 2014 TopGear post by Vijay Pattni which says that "NX 300h fuel economy targeted at 54.3 mpg. That's "prius performance" and seems highly unlikely (or a miss print ?). ES 300h fuel Economy in the 40 mpg range seems more likely.
That is using a different fuel economy measurement cycle...European cycle (unlike EPA) is notorious for being inaccurate.
 

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That is using a different fuel economy measurement cycle...European cycle (unlike EPA) is notorious for being inaccurate.
Good to know about the European EPA. Makes more sense than starship hyperdrive which would also be handy to have.
 

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Too bad even in America the EPA can't ever seem to get the MPG rating right, comparing it to real world numbers it never stays in line with them
 

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Too bad even in America the EPA can't ever seem to get the MPG rating right, comparing it to real world numbers it never stays in line with them
Actually, the latest US EPA protocol is very accurate for an AVERAGE driver. The protocol does NOT take into account a heavy foot, hypermiling, or places that have high speed limits.

There are exceptions to this. Most of the time nowadays, the manufacturers do the protocol themselves for the EPA. There are simply too many cars for the EPA to test individually in their factory. So, EPA relies on the "honesty" of OEMs to do the protocol...probably witnessed by EPA employee i assume. EPA will only re-test a vehicle if consumers question the EPA rating of a car.

This is why from time to time, you will see EPA ratings changed from year to year on the same car. This is because EPA went back and re-tested the car and thus had a different result from OEM testing. Classic example...Toyota Camry Hybrid (prior generation). Toyota (following EPA protocol presumably) testing showed optimistic ratings...after a year or two, EPA came back and re-tested themselves and lowered the fuel economy ratings. I am not sure if EPA punishes these OEMs "errors" or not.
 

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This is why from time to time, you will see EPA ratings changed from year to year on the same car. This is because EPA went back and re-tested the car and thus had a different result from OEM testing. Classic example...Toyota Camry Hybrid (prior generation). Toyota (following EPA protocol presumably) testing showed optimistic ratings...after a year or two, EPA came back and re-tested themselves and lowered the fuel economy ratings. I am not sure if EPA punishes these OEMs "errors" or not.
Example of above: http://www.edmunds.com/car-news/for...-six-vehicles-including-2014-ford-fiesta.html
 

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well at least they are retesting them and it makes sense since car makers do make slight changes to their engines and other things that factor into better mpg
 

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that's pretty good, it would be even better if they can crack the 40mpg mark, likely they can but want to wait till other car makers are catching up and then they'll likely pull that card.
 
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