# low RPM + low MPH = bad for car?

**URL:** <https://forums.speedlife.net/t/low-rpm-low-mph-bad-for-car/29309>\
**Category:** NYSpeed Automotive\
**Created:** [May 15, 2007, 3:58am UTC](https://forums.speedlife.net/t/low-rpm-low-mph-bad-for-car/29309 "2007-05-15T03:58:39Z")\
**Posts on this page:** 1\
**Showing post:** 7

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**Author:** ![Bigairskier1580](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/bigairskier1580/32/7612_2.png) [@Bigairskier1580](https://forums.speedlife.net/u/Bigairskier1580)\
**Post date:** [June 27, 2007, 12:56pm UTC](https://forums.speedlife.net/t/low-rpm-low-mph-bad-for-car/29309/7 "2007-06-27T12:56:21Z")

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Coasting downhill will actually depend on your cars injection system. I know my DSM while coasting at RPMs above around 1200, the O2 sesons would actually read a voltage of 0, which leads me to believe that the injection actually shut down while coasting with zero throttle input.

However, this may vary car to car.

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