Refilling fuel cans

[GLynch]

Bit of a random one but today I filled up my combi can with 5 litres of petrol then got back and put my 2 stroke mix in 

I then realised that on the fuel can it was actually measuring under 5 litres 

I went to 5 litres on the pump not the 5 litres mark on the fuel can, what does everyone else normally measure to? The fuel can or go by the figure on the pump?

 

 

 

Edited August 18, 2022 by GLynch

[htb]

Pump as they supposedly comply with trading standards and weights and measures regs.

[daveatdave]

it might be your can that is not very accurate on the scale double check before you start taking it any further   

[GarethM]

The weights and measures are checked on the pump at a certain temperature 16c I think. But the difference is so miniscule over 5l, your can is however an approximation and mass produced.

 

Use the pump and you won't be far out.

[GLynch]

Ok thanks all, I thought pump would be more accurate just never noticed it before 

[Stubby]

22 minutes ago, GLynch said:

Ok thanks all, I thought pump would be more accurate just never noticed it before 

I would always put the 2t oil in first  then the action of the pump will help mix it evenly .

[Dan Maynard]

8 minutes ago, Stubby said:

I would always put the 2t oil in first  then the action of the pump will help mix it evenly .

Think this could be a milk/tea discussion. I always put the fuel in first as I don't want the oil to stick to the bottom of the can, rather it swirled around as it drops in.

 

Then I put it in the back of my Landrover and drive home, always reckon that gives it a shake too.

[Bob_z_l]

I put oil in first for the same reasoning. Let the fuel mix it up. As you say a good shake up in the truck won't harm it. 

 

Re; accuracy. The can's swell and contract but ought to be close. As you've oiled 4.5 -4.75 litres it'll just be marginally oilier say 45to47:1   which has to be better than running it lean on oil. Yes? 

 

[Joe Newton]

If I remember back to my CS30 I think they suggested half filling the can with petrol, adding the 2t oil and topping the can up with petrol. 

 

Bit of a faff at the pump though. I really don't think it matters compared to accurate measurements and good quality oil and fuel. 

[coppice cutter]

My guess is that with the recent hot weather the can has expanded a bit.

 

Wouldn't have to swell much to lower the level noticeably.