On Thu, 13 Oct 2016 18:56:11 -0700 (PDT), Tim
wrote:

On Thursday, October 13, 2016 at 6:27:18 PM UTC-5, wrote:
On Thu, 13 Oct 2016 13:55:17 -0700 (PDT), wrote:

OK. I am confused. 50:1 means 50 parts gasoline to 1 part oil. Example: 50 liters of gas to 1 liter of oil.By my calculations 6 US gallons equals 22.7 liters. This means you should put about 0.45 of a liter of oil in to get a 50:1 mix.(Simply put - 100:2 or 50:1 or 25:0.5) Can someone tell me what I am missing?
Thanks

In the US we say you use 6 gallons of gas (48 pints of gas) with a
pint of oil so that is 48:1 (or 49:1 in the final volume) but in
either case, close enough for a mixture that was arbitrarily chosen in
the first place.

I like the little bottles that say. "mix the contents of this bottle with one gallon of gasoline for 40:1 ratio" Takes all the guess work out of figuring "parts"

Just be aware they are not full. Don't just fill them up and dump it
in. I think a full bottle is 32:1 and they short fill them for leaner
mixes.
I have some of those bottles with a little compartment at the top. You
squeeze the oil up into the top compartment and dump it in. It is the
right amount of oil for a gallon of gas.
One is 32:1, the other 50:1. That takes care of all of the yard tools
I have.
It has been a real long time since I used premix in an outboard, my
Merc 75 had injection but when I had the 1974 era 40 I used the pint
cans. I bought them by the case.