Jammer when you are in hills or mountains where you need to use the brakes to keep your speed down then use the gears instead of the brakes. If you can slow down using the gears then you should not be using any fuel anyway.
Driving through Blacksburg on the Interstate I did that for 3 miles alternating between 4th and 5th in my Honda. I was behind a line a big rigs and if I stayed in 5th I was going to run into the rear of the truck in front of me at over 85 MPH.
I never use brakes going down any grade unless it is the last resort. Using engine drag is the same as turning the engine off and you avoid the restart issue altogether when you need to go back uphill. In fact up to a point you would be in the correct gear when you started back up the grade.
Now if you were slowing down too much use neutral at the last part of the downhill slope. Then select the gear you need to climb the upcoming grade.
regards
Mech
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