Most of you have newer rigs with automatic oil mixtures, I think. But for those who do not and are not sure about ratio's when at the gas pumps.....I thought perhaps I would share this web site.
You can plug in numbers that will give you the ratio's for a 50:1 mix
I made a chart for my own use for from 5 gallons to 25 gallons in 1 gallon increments. Not sure if I'm going to put a copy in the rear deck lid to use when I have to get the oil and ethanol additives out or put in my pocket but, in any case - no more having to stop and figure.
Ex: have to put in 17 gallons of gas, had to figure how much oil to add to the gas.
Hope it might help some:
Gas/Oil Ratio Chart \

God Bless

Academy has a premix bottle, with all the different mixes on it from a 100 to 1 to 10 to 1

For the math inclined: (x * 128) / y = z
x = gallons of gas
128 = constant (ounces in a gallon)
y = desired ratio
z = ounces of oil to add

OMG!! I was looking for something handy and really simple....but, thanks ( I guess )...
God Bless

6 gallons of unleaded gasoline 16 ounces of oil. 12/32. 24/64. Not that hard to calculate at the pump.

50.1 that is

Something like this: Ratio for 50:1 Oil/Gas

Gallons Oil Required

5 12.8 oz
6 15.36
7 17.92
8 20.48
9 23.04
10 25.6
11 28.16
12 30.72
13 33.28
14 35.84
15 38.4
16 40.96
17 43.52
18 46.08
19 48.64
20 51.2
21 53.76
22 56.32
23 58.88
24 61.44
25 64.00

This^^^^. Had one of these in my bilge area 35 years ago, long before there even was an Academy! Just a Tupperware looking measuring cup with a snap on lid. Takes all math out and allows you to "top off your tank" and not worry about putting in increments of 6 gallons of fuel. Of course that was prior to oil injection for me.

Well, gentlemen, it seems they no longer have such an item. Sounds good but not available
God Bless

Go to any motorcycle shop and get yourself a Ratio Rite....

www.ratiorite.com Just a few bucks to your door. Amazon, motorcycle shop...

Have one I'm using now. Still looks like its going to be easier to use a chart to figure out just how much...then use the measuring cup, but thank you
God Bless

Several versions out there. This one is ar BPS. I can't see how any other way would be easier. You have to measure the oil anyway. I keep mine in the rear with the gas tank. Literally tales like 30 seconds to see amount needed, fill the cup and pour in the tank. The chart is on the cup.

I believe WalMart has the measuring bottles as well. Can't get any easier. IF you put in 12 gallons just fill oil to the 12 gallon mark under 50:1 (there are several ratios shown).

yep. Wally World had them.