40 to 1 fuel mix Craftsman Chainsaws Use a Gas to Oil Fuel Mixture of 40:1. :msp_biggrin: Too many guys over-think the oil thing. 3: 18. The most common practice is to mix 1 pint (16 oz) to the 6 gallons of fuel that they hold. Fifty to one (50:1) is one of the easiest 2 stroke ratios to calculate, you simply multiply the litre amount by 2 and add a zero. What is a 1 to 4 ratio? A 1:4 fuel ratio means that for every 1 part of oil, there are 4 parts of gasoline. Brought to you by Raceday. 6 out of 5 stars. Purchasing fuel in an approved container. I rarely use it, like maybe once every 2-3 years, so despite using a fuel stabilizer, the can of mix can get really old. rpfmercvcgvyajvjudzqfqkzxntubtqmavgstrqzbljgtsulfntmapjvpomrulcnytatbihgjjtpihfyim