Can someone help to explain the use of a Combi Fuel Can 5 Litre?

[AHPP]

kram's not wrong wrong btw. Combicans aren't the be all and end all. I don't use one. I don't like the bourgeois character of the nozzles and if I only need a battery saw, I only need chain oil. I'd like to say I could leave the oil in the van too and just use some belonging to whoever I'm climbing for but a depressingly large amount of the time, I'm the only adult present who brought any chain oil to a tree surgery job.

[MattyF]

12 minutes ago, AHPP said:

kram's not wrong wrong btw. Combicans aren't the be all and end all. I don't use one. I don't like the bourgeois character of the nozzles and if I only need a battery saw, I only need chain oil. I'd like to say I could leave the oil in the van too and just use some belonging to whoever I'm climbing for but a depressingly large amount of the time, I'm the only adult present who brought any chain oil to a tree surgery job.

Thing is the stihl combo is marked at 5l so if you do a shot for 5 l and use that mark it’s pretty much bang on, despite what the pumps telling you … alternately shoot up a 20 litre can fill it up and poor it in the combi when needed, this usually happens if we are doing forestry as two hand cutters will easily use 5 l a day and quick fill nozzles are just easy.. I really don’t see a better alternative. 

[AHPP]

Buy monstrously expensive alkylate premix and slop half of it over the side of the saw. What else.

 

They make more sense in the woods or with pump and mix fuel anywhere.

[Mark Bolam]

Who’s got time to go to a garage when you run out of mix on site?

 

Matty’s answer is by far the most sensible one.

[Bolt]

59 minutes ago, AHPP said:

Out of interest, does anyone know the tolerance on petrol pump readouts? 

It would appear that they are accurate enough to not make a kippers dick of difference in over 30 years of buying petrol for 2 stroke engines.

[Stere]

Measure at the bottom of the meniscus when measuring out the volumes...

[htb]

7 hours ago, Stere said:

Measure at the bottom of the meniscus when measuring out the volumes...

True, but don't go there, we are already 6 pages in.

 

[doobin]

9 hours ago, Mark Bolam said:

Who’s got time to go to a garage when you run out of mix on site?

 

Matty’s answer is by far the most sensible one.

Am I the only person who keeps half a dozen 5l cans of mixed 2t petrol and refills them all at the garage at the same time?

 

same with neat petrol but 10 litre cans rather than 5. 

[monkeybusiness]

10 hours ago, AHPP said:

Out of interest, does anyone know the tolerance on petrol pump readouts? There are rules on food packaging weights etc. Must be same for fuel.

 

Related: I had a temp job at a heating oil delivery depot. I can't remember if I was told this in relation to the main kero products or bunkering derv but it was widely acknowledged that you wanted to buy fuel in the morning when it was cold and at its lowest volume per mole. 

We were doing some work for National Grid in Anglesey a few years ago, and I was filling a tractor up at a local petrol station with white diesel. (This was a highly unusual procedure from the perspective of the garage owner - red diesel only for tractors surely!). 
Customs and excise were staying in the same hotel as us, and had several marked vehicles on the car park each evening. This came up in conversation with said garage owner who told me that they were checking ‘weights and measures’ on the island, and had been to spot-check the calibration of his pumps the week before. ‘Must have been a bit of a worrying event for you?’ I suggested. It turned out he was actually pretty upset as his pumps had been under-reading!

 

In relation to this thread - measure oil into 20l Jerry can(s), fill with 20l at petrol station. Decant into combi-cans as required. Has never caused a single issue in 25 years. 

Edited June 3 by monkeybusiness

[NJA]

1 hour ago, monkeybusiness said:

In relation to this thread - measure oil into 20l Jerry can(s), fill with 20l at petrol station. Decant into combi-cans as required. Has never caused a single issue in 25 years. 

 

10 hours ago, Bolt said:

It would appear that they are accurate enough to not make a kippers dick of difference in over 30 years of buying petrol for 2 stroke engines.

Don't feel we have enough evidence in such a short period, please could you report back in another 25 - 30years so we get a better idea if there's any risks associated with putting fuel and oil in a can and mixing together?