Two stroke oil mixture chart

[Rabid Rabbit]

Two stroke oil mixture chart

Here is a nice chart to print out: http://www.rctek.com/pdf/fuel_to_oil_ratio_chart.pdf


...and here is a nice calculator:

http://www.csgnetwork.com/oilfuelcalc.html


How to Calculate Fuel to Oil Ratios

Determining how much oil to fuel is needed depends on the ratio for the engine. A 20:1 ratio needs more oil than a 50:1 ratio. The proper fuel-to-oil ratio is needed when mixing fuel for a 2-cycle engine, such as a snow blower or a boat engine. Calculating the ratio requires determining how much oil you will need to add per gallon of gas. You can easily calculate a fuel-to-oil ratio using simple math.



Instructions

1. 
   
   • 1 Locate the fuel-to-oil ratio for the engine on a sticker or in the owner's manual. A ratio can be 32:1, 40:1 or 50:1, depending on the engine requirements.
   • 2 Divide the first number of the ratio into 128. This will look like 128/32, 128/40 and 50/128. This gives you a result is 4, 3.2, and, 2.56. This is the amount of oil that you need to add, in ounces, to 1 gallon of gas.
   • 3 Divide the result by 2 to determine the amount of oil for 1/2 a gallon of gas.
   • 4 Multiply the result in step 2 by the number of gallons that will fill a gas container. If a container holds 5 gallons multiply the result by 5. A ratio of 32:1 will require 20 ounces of oil.
   
   

Tips & Warnings

• There are 128 ounces in 1 gallon.
• The mathematical equation for a 32:1 fuel to oil ratio is 1/32(12.
• Small bottles of 2-cycle engine oil are already measured to the amount needed for a gallon of gas.

[Earthsick]

I picked a nifty item from wally world recently: a quart of oil with two chambers. The bottom is the reservoir, the top is a bowl with notches that, when added to 1 gallon of gas, denotes the ratio of gas:oil

Like this: http://www.walmart.com/ip/Weed-Eater...c-Oil/16564807

[ThimbleOwl]

Earthsick, I've purchased that same oil from wally world, the measuring mechanism is pretty neat!

Lately, I've been using this 50:1 fuel mixture calculator it can handle other ratios as well.