Pros and cons of the 2.5L engine vs. 3.7 - Page 2 - Mazda 6 Forums : Mazda 6 Forum / Mazda Atenza Forum
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post #11 of 13 (permalink) Old 12-18-2014, 06:12 PM
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Mileage with the 4 cylinder is kind of Jeckyll and Hyde highway vs. city. Low 20's are the norm in city driving and that's only if you are driving long enough city trips in warm enough weather. My commute is less than 9 miles so with longer warm up time at lower temperatures my mpg can easily fall into the 18mpg range, even 16mpg when I use the remote start as the car is idling for 10 minutes at 0 mph. On the highway I have no problem getting 30+ with 4 people and luggage in the car. On the rare occasion that I pilot an empty car by myself on the highway 34+ mpg is often achievable.
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post #12 of 13 (permalink) Old 12-18-2014, 06:21 PM
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All 4 cylinder engines in the Ford universe are either copies of or derived from Mazda MZR engines. All 6 cylinder engines are Ford products. Ford owns rights to build and use the MZR generation of engines under their Duratec brand name for global service in its vehicles since 2003. All Mazda V6's are really Ford Duratec engines.

As of 2011, Mazda discontinued development of the MZR generation of engines to be replaced by their new SkyActiv generation of engines. Ford continues to develop and manufacture variants of the Z-engine and L-engine for their Duratec and EcoBoost four-cylinder engines. The 3rd generation MX-5 is still produced with the MZR 1.8 or 2.0 engine, which may be shipped from the factory with a Ford Motor Company oil filter fitted, suggesting a shared production line.

I think Mazda divorced with Ford and is moving manufacturing back to Japan because they have determined that they no longer need V6's in their future.

Last edited by ThirdMazda; 12-18-2014 at 06:27 PM. Reason: More detail
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post #13 of 13 (permalink) Old 08-03-2018, 09:52 PM
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Quote:
Originally Posted by ThirdMazda View Post
All 4 cylinder engines in the Ford universe are either copies of or derived from Mazda MZR engines. All 6 cylinder engines are Ford products. Ford owns rights to build and use the MZR generation of engines under their Duratec brand name for global service in its vehicles since 2003. All Mazda V6's are really Ford Duratec engines.

As of 2011, Mazda discontinued development of the MZR generation of engines to be replaced by their new SkyActiv generation of engines. Ford continues to develop and manufacture variants of the Z-engine and L-engine for their Duratec and EcoBoost four-cylinder engines. The 3rd generation MX-5 is still produced with the MZR 1.8 or 2.0 engine, which may be shipped from the factory with a Ford Motor Company oil filter fitted, suggesting a shared production line.

I think Mazda divorced with Ford and is moving manufacturing back to Japan because they have determined that they no longer need V6's in their future.
Not true. The V6 engines are also Mazda design. The Duratec 30 V6 is a Mazda AJ engine, which was derived from the smaller displacement "K" family of V6 engines. The Cyclone V6's are also Mazda design by the name of "MZI"
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