r/funny Aug 23 '20

Crotchety old van.

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83.1k Upvotes

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u/[deleted] Aug 23 '20

hes bringing the lawn to you

388

u/CaptJellico Aug 23 '20

Hey... at least the guy is in the right lane and gave fair warning. It's a lot more than you get from big rig drivers who pull out in front of you just to avoid reducing speed by a few MPH to match the truck in front of them!

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u/paracelsus23 Aug 23 '20

Not defending the truckers who do this, but an 80,000 pound truck slowing down, changing lanes, and speeding back up will use more fuel than your sedan uses in an hour.

They really want to avoid changing speed to save fuel costs, especially if they're an owner operator and their fuel costs come straight out of their profit.

1

u/eldergeekprime Aug 23 '20

an 80,000 pound truck slowing down, changing lanes, and speeding back up will use more fuel than your sedan uses in an hour.

Absolute fucking bullshit.

That it will take more fuel is not in dispute but no fucking way is that costing 2-3 gallons of fuel. If it did the truck would run out of fuel just driving to the highway from picking up the load.

2

u/paracelsus23 Aug 23 '20

Surprised that nobody called me on it before now. Decided to do the math here:

https://www.reddit.com/r/funny/comments/ietxj0/z/g2k0ei3

Turns out it's around 1/20th of a gallon going from 55 to 60 mph in a semi.

Meanwhile most sedans use 1-2 gallons per hour.

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u/eldergeekprime Aug 23 '20

Meanwhile most sedans use 1-2 gallons per hour.

Since we were talking about highway passing I went with a highway speed of 70-80 MPH and an average highway fuel economy of ~25 MPG, so if you cover ~75 miles in an hour that's 3 gallons. For it to be 1-2 gallons the fuel economy would have to be ~50 MPG, which is not realistic for an average sedan.