Fuel Density Calculations

[Tesla]

Just a random thought so apologies if I am going off on one...

On a freezing cold morning, fuel is surely denser?

So, assuming one purchases 60l of fuel (a full tank for a family saloon) on say a cold 0degree morning compared to a summers 15degree morning would you get more fuel for your money on the winters day?

If so, what calculations and formula are needed to work out the differences.

I assume they are tiny but I am interested to learn

 

[andymac]

The underground tanks at petrol stations are buried about 1 metre below surface level. As such, the temperature of the fuel inside them will not really be effected by surface temperature changes. As the tanks tend to be below the concrete surface of the forecourt, I'm guessing that temp changes across seasoons would be so small as to be pretty much un-calculable.

 

[Shimmy]

Yes the fuel will be more dense on a colder day, basic physics.

But you will be using more fuel on a cold day anyway.

Sorry don't know the calculations, google it

 

[Simon]

Hardly any difference.

 

[Ed]

But you will be using more fuel on a cold day anyway.

I'd have thought less since the air is also denser.

 

[TaKeN]

I remember reading somewhere on a forum that you should buy your petrol first thing in the morning because you end up with more petrol for your money

Not sure if theres much truth in that though.

 

[Ed]

you should buy your petrol first thing in the morning because you end up with more petrol for your money

I just find the cheapest as it has the same effect.

 

[TaKeN]

I'd have thought less since the air is also denser.

But your car sticks in more fuel, if it has denser air IIRC

 

[BigglesPiP]

The volume of a liquid changes very very very little with temperature.

The Change in viscosity, and rate of vaporisation varies a fair bit with temperature though, so there may well be an ideal filling temperature.