Miles per Gallon

General cycling advice ( NOT technical ! )
User avatar
Mick F
Spambuster
Posts: 50319
Joined: 7 Jan 2007, 11:24am
Location: Tamar Valley, Cornwall

Miles per Gallon

Postby Mick F » 4 Nov 2014, 3:26pm

I seem to doing 47kcals per mile according to my records for this year so far.
Call it 50kcals per mile.

If I consumed unleaded petrol instead of "human food", how many miles per gallon would I be doing?
Would I be doing better if I consumed diesel?
Mick F. Cornwall

pete75
Posts: 13406
Joined: 24 Jul 2007, 2:37pm

Re: Miles per Gallon

Postby pete75 » 4 Nov 2014, 3:34pm

Mick F wrote:Would I be doing better if I consumed diesel?


Well it doesn't taste very good - accidently got some sprayed in my mouth once. Awful taste. On the plus side I found the only thing to get rid of the taste was a copious amount of Laphroaig.

User avatar
easyroller
Posts: 523
Joined: 27 Feb 2012, 8:05am
Location: Berkshire

Re: Miles per Gallon

Postby easyroller » 4 Nov 2014, 3:59pm

Well from memory a litre of petrol contains roughly 7500 calories. :)

LollyKat
Posts: 3008
Joined: 28 May 2011, 11:25pm
Location: Scotland

Re: Miles per Gallon

Postby LollyKat » 4 Nov 2014, 4:10pm

I don't know about diesel but I used to reckon on 10 miles to the Mars Bar. :D

User avatar
Mick F
Spambuster
Posts: 50319
Joined: 7 Jan 2007, 11:24am
Location: Tamar Valley, Cornwall

Re: Miles per Gallon

Postby Mick F » 4 Nov 2014, 4:21pm

easyroller wrote:Well from memory a litre of petrol contains roughly 7500 calories. :)
That's interesting.

7,500kcals per Ltr = 7,500 x 4.546 = 34,095kcals per gallon.
1mile = 50kcals therefore I'm doing 681.9mpg.

That's quite good! :D
No wonder we don't pay road tax.
Mick F. Cornwall

Neil C
Posts: 120
Joined: 11 Mar 2014, 6:37pm

Re: Miles per Gallon

Postby Neil C » 4 Nov 2014, 4:22pm

Wikipedia gives the energy density of 32.4 MJ/litre for petrol.

My chunky KitKat gives energy per bar of 1035kJ or 247kcal.

So Mick would do about 5miles per bar.

And a litre of petrol is the equivalent of 32,400/1035 = 31.3 KitKats or 156 Mickmiles.

That's about 700 Mickmiles per gallon if he can extract all the energy.

Edit - Beaten to it. Maybe if I ran my brain on petrol I would have got the answer first!

User avatar
Mick F
Spambuster
Posts: 50319
Joined: 7 Jan 2007, 11:24am
Location: Tamar Valley, Cornwall

Re: Miles per Gallon

Postby Mick F » 4 Nov 2014, 4:27pm

Neil C wrote:My chunky KitKat gives energy per bar of 1035kJ or 247kcal.
So Mick would do about 5miles per bar.
That's another interesting fact.
I could eat as many choccy bars as I wanted in a day, so long as I kept cycling.

Ten bars would be enough for a good ride, and I wouldn't put any weight on.
I'm sure there's a catch in there somewhere .........
Mick F. Cornwall

karlt
Posts: 2244
Joined: 15 Jul 2011, 2:07pm

Re: Miles per Gallon

Postby karlt » 4 Nov 2014, 4:39pm

Not sure there is. I took up cycling, for one reason, because it was preferable to eating less. Weight gradually dropping.

Neil C
Posts: 120
Joined: 11 Mar 2014, 6:37pm

Re: Miles per Gallon

Postby Neil C » 4 Nov 2014, 4:42pm

Mick F wrote:Ten bars would be enough for a good ride, and I wouldn't put any weight on.
I'm sure there's a catch in there somewhere .........


Depends what you washed it down with!

As a seasoned LEJOGer I'm sure you know just how much energy you need. When I did it earlier this year breakfast consisted of cereal, porridge, full english, and toast. A couple of hours later I'd be stopping for a mid-morning top-up. Then lunch. Cake and scones in the afternoon. And when I got to the hotel, a snack while waiting for the three-course evening meal. All washed down with beer. Didn't put on any weight.

User avatar
easyroller
Posts: 523
Joined: 27 Feb 2012, 8:05am
Location: Berkshire

Re: Miles per Gallon

Postby easyroller » 4 Nov 2014, 4:55pm

I consider being able to eat truck loads one of the many benefits of cycling. I'd rather not run myself on petrol, it just doesn't have the same appeal as the mid ride coffee and cake! I often get asked at work "How can you eat so much and be so skinny?" To which I reply by asking them to join me for just one ride...

mrjemm
Posts: 2933
Joined: 20 Nov 2011, 4:33pm

Re: Miles per Gallon

Postby mrjemm » 4 Nov 2014, 5:04pm

Mick F wrote:
Neil C wrote:My chunky KitKat gives energy per bar of 1035kJ or 247kcal.
So Mick would do about 5miles per bar.
That's another interesting fact.
I could eat as many choccy bars as I wanted in a day, so long as I kept cycling.

Ten bars would be enough for a good ride, and I wouldn't put any weight on.
I'm sure there's a catch in there somewhere .........


Diabetes and dentures perhaps?

User avatar
al_yrpal
Posts: 8855
Joined: 25 Jul 2007, 9:47pm
Location: Cully
Contact:

Re: Miles per Gallon

Postby al_yrpal » 4 Nov 2014, 5:04pm

Never mind the MPG, how are your carbon emissions? Are you trashing the planet?

Al :mrgreen:
Touring on a bicycle is a great way to explore and appreciate the countryside and towns you pass through. Make a difference...

mrjemm
Posts: 2933
Joined: 20 Nov 2011, 4:33pm

Re: Miles per Gallon

Postby mrjemm » 4 Nov 2014, 5:05pm

al_yrpal wrote:Never mind the MPG, how are your carbon emissions? Are you trashing the planet?

Al :mrgreen:


Never mind, his trees alongside the drive'll offset those... oh wait. :?

Joe.B
Posts: 270
Joined: 13 Nov 2010, 11:31am

Re: Miles per Gallon

Postby Joe.B » 4 Nov 2014, 5:18pm

karlt wrote:Not sure there is. I took up cycling, for one reason, because it was preferable to eating less. Weight gradually dropping.


Yes, if I put weight on, (as I recently have), my first thought is not to diet but to cycle more.

Merry_Wanderer
Posts: 1002
Joined: 31 Aug 2012, 9:33am
Location: North Leicestershire

Re: Miles per Gallon

Postby Merry_Wanderer » 4 Nov 2014, 6:06pm

My thoughts exactly! I have been cycle commuting every day since mid-August and have lost half a stone. I am eating more than I did when I commuted 2 days a week and I weigh less. Result! I reckon that I burn 50kcals per mile on the Brompton, possibly more when I turn on the dynamo lights :-)