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# How much 2 stroke oil do I need to add to 1 litre of petrol to achieve a rotio of 40:1

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40:1, means 40 parts petrol to 1 part oil. So it's (1 litre-1000ml) divided by 40= 25 ml of oil. Even if you had an odd amount of fuel, Say 7.5 litre's-7500ml 7500 divided by 40 = 187.5ml of oil.

Posted on Sep 07, 2010

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pauly46 here
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so if you want to make 2 litre mix use 40 mils of 2 stroke oil , then add 2 litres of petrol only and give good shake

note use good quality 2 stroke oil , such as sthil or husqvarna oil from your outdoor power shop

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cheers hope this helps

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