Relative size of US gallon vs. Imperial gallon - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 18 (permalink) Old 09-05-2008, 09:39 PM Thread Starter
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Question Relative size of US gallon vs. Imperial gallon

We all know that a US gallon is 1/5 smaller than an Imperial gallon don`t we? It is 128 oz in a US gal. compared to 160 oz in an Imp. gal. Clearly a ratio of 4/5 or 1/5 smaller, right? WRONG!!! A US gal. is only 1/6 smaller than an Imperial gal. WWWhhhaaaaattttt??? you are saying to your self. Don`t leave yet-it is true. I will explain. You can grab your service manual and check my conversion factors if you want.

1 US gallon / 1 Imp. gallon
3.785 liters / 4.546 liters = 0.8326 = 5/6 (approx.)--1/6 smaller not 1/5
(3785 mililiters) (4546 ml)
So don`t leave yet, I can see your eyes glazing over. we are almost there.

Let`s do one more comparison, ok 2 more. 1 US gal. = 3785 ml / 128 oz. = 29.57 ml/ US oz.

1 Imperial gal. = 4546 ml /160 oz. = 28.41 ml / Imp. oz.

And therin we have the solution to our little mystery, the US ounce is approximately 1.16 ml larger than the Imp. oz. This makes the difference of just over 5 additional oz. in a US gal. which is enough to change the ratio to 5/6 instead of 4/5.

Well this might be useful to somebody someday. I just found it interesting.
:

Gordon

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post #2 of 18 (permalink) Old 09-05-2008, 10:09 PM
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Originally Posted by OlHossCanada View Post
We all know that a US gallon is 1/5 smaller than an Imperial gallon don`t we? ......
Uh, no , we don't. Guessing most here have no clue what an Imperial Gallon is, and for the most part, probly don't care....not that your post was not intresting and informative.

So, thank you for posting the information, I would guess at least one of us at some time might find it usefull.

Are all service stations in Canada selling gas by Imperial gallons? Are not some pricing by liter?

And what is the exchange rate of US dollars to whatever you use up there?

Now, can you explain MPG and LPK?

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post #3 of 18 (permalink) Old 09-05-2008, 10:27 PM
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I'm 40yo and remember in elementary school they said we would all be switching to metric and we needed to learn it. glad I saved that brainspace and didnt worry about it except for the 5 - 21 mm sockets!

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post #4 of 18 (permalink) Old 09-05-2008, 11:12 PM
 
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Really want a fun time with conversions??
For all you math-types, try www.joshmadison.com/convert
you can convert stuff like above or kilomoles to millimoles, or foot-candles to lux, or dyne-centimeters to electron-volt.
Plus all the "normal conversions (I use it primarily for ft-lb to NM convo's).
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post #5 of 18 (permalink) Old 09-05-2008, 11:20 PM
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Let me ask ya - When the car companies are doing their MPG testing, don't they use an imperial gallon of ultra refined (thus more efficient-burning)? Or do they just use a standard US gallon of ultra refined fuel?

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post #6 of 18 (permalink) Old 09-05-2008, 11:24 PM Thread Starter
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Quote:
Originally Posted by Knifemaker View Post
Uh, no , we don't. Guessing most here have no clue what an Imperial Gallon is, and for the most part, probly don't care....not that your post was not intresting and informative.

So, thank you for posting the information, I would guess at least one of us at some time might find it usefull.

Are all service stations in Canada selling gas by Imperial gallons? Are not some pricing by liter?

And what is the exchange rate of US dollars to whatever you use up there?

Now, can you explain MPG and LPK?

KiloMeter
All gas sold by the liter for many years.
US$ going up against CDN$ recently, not sure of rate.

Gordon

1991 VN 750 -"Cosmic Lady" or "Bad Girl"?
Purchased May 16, 2008
Approx.19,300km (12,000 miles)

H-D windshield
Relocated R/R
MF-AGM battery
Fiamm Freeway Blaster horns
F&S luggage rack and engine guard
Kury Offset Hiway pegs
July 13, 2016, Riding on the DARKSIDE now, Classic Radial 165/80-15


TOP TEN THINGS A NEW RIDER/OWNER SHOULD DO. Click on link.
https://www.vn750.com/forum/showthread.php?t=9127
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post #7 of 18 (permalink) Old 09-05-2008, 11:28 PM
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Quote:
Originally Posted by OlHossCanada View Post
All gas sold by the liter for many years.
.

Ah...then where would an average guy like myself run into something using "Imperial Gallons" ???

(That's how you sell your beer right?)




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post #8 of 18 (permalink) Old 09-06-2008, 03:13 AM
 
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with the cost of petrol being what it is over here in the UK i would sooner fill up with a gallon of Imperial than a gallon of US

we now are paying 5.36 per gallon
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post #9 of 18 (permalink) Old 09-06-2008, 05:51 AM
 
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with the cost of petrol being what it is over here in the UK i would sooner fill up with a gallon of Imperial than a gallon of US

we now are paying 5.36 per gallon

Oz fuel prices convert to approx 3 n arf quid for a gallon - now if you go off the average mpg a vn750 gets and pick that as a lets go looky round n see what we can see in the country side, don't expect to see too much - the bloody country's too big - I wish I was livin in Wales again!!
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post #10 of 18 (permalink) Old 09-06-2008, 09:09 AM
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Quote:
Originally Posted by wib714 View Post
I'm 40yo and remember in elementary school they said we would all be switching to metric and we needed to learn it. glad I saved that brainspace and didnt worry about it except for the 5 - 21 mm sockets!

I remember that too. And it never happened???!!!
But.....
The job I have now, I have to use metrics for linear measuring
At my old job, I had to convert from metrics once and awhile, but not often. Now I have to use it every day. Once I got used to it again, it's become pretty easy. Just sux that I have so many micrometers that read English and not metric
Luckily though, some are digital and have metric capability!!

And, for those interested in linear conversion of metric to English....

25.4mm (exactly) = 1in.
.03937in. (approx) = 1mm

As for the US Gal & Imp Gal.... I never knew that ....


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