What's the name of that pump?

[das_peikko]

What's the name of the pump where you can walk in and tell the cashier you wan't the pump to shut off at exactly 2 gallons?

There must be a name or someway of identifying that type of pump.

That type of pump is very useful for making 2-cyle engine fuel.

 

[dishdude]

Prepaid?

 

[Nyogtha]

I pay at the pump and watch the meter display closely personally. I only mix 1 gal of 2 cycle mix per season unless there's a major wind storm or hurricane.

OP, you could always multiply the price per gallon by two if two gallons is what you want and prepay that amount.

 

[Brybo86]

I think that 1.96 gallons and 2 and 2.03 gallons mixed with the same amount of 2 stroke oil won't have any measurable performance or wear differences

 

[Lyman]

Gas pump! Do I win something?

 

[Linctex]

Originally Posted by Brybo86
I think that 1.96 gallons and 2 and 2.03 gallons mixed with the same amount of 2 stroke oil won't have any measurable performance or wear differences


100% correct.

Cashiers stop the pump at a set $ amount, not gallons

 

[Silk]

What if you put fuel in the can yourself...or is that too scary ? Can't you go to the pump and put what you want in ?

 

[Shannow]

Precisely having someone else measure the fuel doesn't negate the fact that one has to measure accurately the oil.

I just buy one of the mixing bottles that does 1 litre at a time...transfer petrol from my jerry can, fill to the line, and add oil to the next line.

 

[das_peikko]

Originally Posted by Silk
What if you put fuel in the can yourself...or is that too scary ? Can't you go to the pump and put what you want in ?


Stopping and starting the pump, or slowing down the flow by barely squeezing the trigger, both brings into question the accuracy of the volume measured by the pump. I'm thinking that pre-pay is more accurate than me jockeying with the nozzle trigger.

 

[Nyogtha]

I believe it's a positive displacement meter, which these days reads to 0.001 gallons, and is routinely checked and certified. Why do you believe the flow rate significantly affects pump accuracy?

 

[Shannow]

Yeah, when I worked in gas stations, and someone complained to weights and measures (usually Commodore or Kingswood station wagon with pancake under floor tanks), the white van with the calibrated jugs would turn up and check the accuracy of the pumps at variable flow rates.

 

[eljefino]

By the time you're doing this the accuracy of the oil mixed will be your big concern. Both the amount stuck to the insides of the single-use container and the actual oil factory possibly putting more or less in.

 

[hatt]

Originally Posted by das_peikko
Originally Posted by Silk
What if you put fuel in the can yourself...or is that too scary ? Can't you go to the pump and put what you want in ?


Stopping and starting the pump, or slowing down the flow by barely squeezing the trigger, both brings into question the accuracy of the volume measured by the pump. I'm thinking that pre-pay is more accurate than me jockeying with the nozzle trigger.

The pump also slows down when getting close to the prepaid amount. Mixing premix isn't a scientific endeavour. Close is good enough. Plenty of people dump in a capful of oil when they fill the tank with regular gas. I wouldn't do that but it seems to work for them.

 

[Kira]

I love the "white van" reference.

 

[Nyogtha]

Cat detector van from the Ministry of 'Ousing. Never seen so many bleedin' aerials!

 

[anndel]

When I go to the gas station selling non-ethanol gas for our lawn equipment, I tell the cashier exactly 2 gallons and the pump stops exactly there. Linctex is correct, it stops at the $$$ amount not quantity.