Piston Slap: Hat Trick!

Jesse writes:

Hello, Sajeev.

My 2013 Outback 2.5i is fine and I don’t have any questions about it. Instead I wonder:

1. Why do car reviews measure acceleration in time but deceleration in distance?

2. Why do high performance electric cars need conventional brakes? I think there was a Mini concept a few years back that had 4 in-wheel electric motors that did all of the accel/decel.

3. Why don’t cars with CVTs have a ‘downshift’ button? Is it too hard on the transmission? Should I stop using the paddles to do so?

Thanks!

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Piston Slap: Blogging About Engine Bogging

Pat writes:

Hi Sajeev,

I have a question about driving style that I’d like to pose to you and the B&B. Part of my highway commute is a steady 2 mile grade. With a running start of 75 mph, my 2007 Mazda B2300 slows to about 62 mph by the top of the hill when I keep it in 5th gear, with the engine turning about 2000 rpm. I can maintain 70+ if I drop into 4th and floor it, but I’m a cheapskate at heart. My question is, is it really more efficient to lug up the hill in top gear, or am I just kidding myself and doing irreparable damage to my engine?

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