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Message: <blockquote data-quote="astalavista_baby" data-source="post: 1077853" data-attributes="member: 108"><p>People downshift because when you do that, your engine naturally runs at a higher rev and unless you step on the accelerator, it will actually slow the car down. Well, of course you do not downshift to say the 2nd gear at a speed of say 150km/h. That would spoil your engine.</p><p></p><p>Have you ever noticed a road sign by the side of the road whenever you are going downhills for quite a distance that asks you to use low gear when decending the hill? It's also for the same reason that we are asked to do so. When you go downhill and added by the fact that the forward momentum is more, you typically need more brake pressure to reduce the speed of the car and that naturally adds to more brake friction and hence more heat. This eventually leads to your brakes overheating after prolonged use. To reduce the brake usage, we use low gears to aid in the braking of the car. We call this engine braking.</p><p></p><p>Well, just my two cents and I hope I have enlightened you somewhat. :)</p></blockquote><p></p>

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