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Why old diesel engine cars had a low millage?

Updated: 8/19/2019
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13y ago

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Back before MPG was important diesel was used because it was inexpensive. So the car engines were not designed to have good MPG, they were designed to run well and be as similar as possible to how a gas engine preformed. Now MPG is important, and since you can get much more power out of diesel, small diesel car engines are being designed to run more efficiently. This is also because there is more technology available to do so. This enters the clean diesel engine.

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