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Need tio make 25:1 Oil Mix

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Old 05-01-2010, 07:16 PM   #1
New2FG
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Need tio make 25:1 Oil Mix

I bought a 3.2 oz. bottle of synthetic oil and it says a gallon makes 40:1..I'm no mathematician..so how much gas do I need to make 25:1? Thanks.

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Old 05-01-2010, 08:12 PM   #2
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I can only work it out in metric so here goes........

1 US fl oz = 30ml x 3.2 (for your bottle) = 96ml

96 x 25 (25:1 ratio) = 2400ml or 2.4L of gas

Converting back to US gallons........
1L = 0.26 US gallons x 2.4L = 0.624 gallons of fuel for your bottle


Hope this helps
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Old 05-01-2010, 08:14 PM   #3
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Get a 2 stroke mixing bottle off Ebay, or perhaps a local garage or similar.
They indicate a 1 litre fill point, and then give several options of how much oil to add to give 25:1, 32:1, 40:1 etc. Cheap as well.
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Old 05-01-2010, 09:12 PM   #4
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http://www.csgnetwork.com/oilfuelcalc.html
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Old 05-02-2010, 12:08 AM   #5
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Ok thanks guys..Atom my friend got one of those bottles with his King Motors..I definitely gotta get one.
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Old 05-02-2010, 02:23 AM   #6
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you need in US measurements 5.2 oz of oil for one US gallon to make 25:1 ratio

4.2 oz of oil would make 32:1 ratio in one US gallon

and 3.2 oz of oil would make 40:1 in one US gallon
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Old 05-02-2010, 04:00 AM   #7
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I do the no brainer... 100ml of oil to 2.5 litres of gas. 2.5 litres is 2500 ml
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Old 05-02-2010, 05:14 PM   #8
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correct me if Iam wrong? I use 4 liters of petrol and 160ml of oil and does that make a 25:1 mix? Ive been using it method for 2 years and Ive had no problems.
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Old 05-02-2010, 05:18 PM   #9
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Ok thanks guys..Atom my friend got one of those bottles with his King Motors..I definitely gotta get one.
im just worndering iv just got a km how do them bottles work ??
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Old 05-02-2010, 09:39 PM   #10
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Question here, I run my FG 32 to 1. I hear about all the 25 to 1. Am I going to hurt anything? Easy to figure out, 4oz to a gallon. So in my area alot of the 2 cycle oil comes in 8 oz jugs.

I run just standart 2 cycle oil from the parts store. I havent got into the synthic stuff yet. Though at work they switched us to synthic stuff for our hand saws and that kind of stuff. Ended up blowing up some of the stuff. After that we were told you have to watch some of the fuel and such. Gas will break down within 30 days and with some high test oil could be quicker. Also, being from the Minnesota (USA) area they add some stuff to the fuel for the winter mix, so keep in mind different fuel for the seasons.
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Old 05-02-2010, 09:52 PM   #11
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correct me if Iam wrong? I use 4 liters of petrol and 160ml of oil and does that make a 25:1 mix? Ive been using it method for 2 years and Ive had no problems.
Yes mate 40ml of oil per 1 litre of fuel = 25:1 mix
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Old 05-02-2010, 09:55 PM   #12
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Originally Posted by littleguy301 View Post
Question here, I run my FG 32 to 1. I hear about all the 25 to 1. Am I going to hurt anything? Easy to figure out, 4oz to a gallon. So in my area alot of the 2 cycle oil comes in 8 oz jugs.

I run just standart 2 cycle oil from the parts store. I havent got into the synthic stuff yet. Though at work they switched us to synthic stuff for our hand saws and that kind of stuff. Ended up blowing up some of the stuff. After that we were told you have to watch some of the fuel and such. Gas will break down within 30 days and with some high test oil could be quicker. Also, being from the Minnesota (USA) area they add some stuff to the fuel for the winter mix, so keep in mind different fuel for the seasons.
Your mix will go 'off' after about 30 days thats why its better to use a 1L mixing bottle if you dont get out too often. That way you can store your fuel and oil separate until you need it.
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Old 05-03-2010, 05:20 AM   #13
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Good idea Dawrfy, makes sense. Being from the US I still havent gotten the liter thing

I also thought that if I went 32 to 1 I could use it in my weedwacker (40 to 1) or in the winter in my ice auger (25 to 1)

Just some worldy thinking
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Old 05-03-2010, 05:32 AM   #14
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hell im just finishing up gas i bought last November. Literally just filled the tanks with the rest of it 2 days ago. runs just fine. i use Premium 93 here stateside.
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Old 05-03-2010, 07:55 AM   #15
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Originally Posted by CSR260 View Post
correct me if Iam wrong? I use 4 liters of petrol and 160ml of oil and does that make a 25:1 mix? Ive been using it method for 2 years and Ive had no problems.
Yes thats a 25:1 ratio, basically 40ml per litre = 25:1
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Old 05-03-2010, 11:55 AM   #16
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Quote:
Originally Posted by littleguy301 View Post
Good idea Dawrfy, makes sense. Being from the US I still havent gotten the liter thing

I also thought that if I went 32 to 1 I could use it in my weedwacker (40 to 1) or in the winter in my ice auger (25 to 1)

Just some worldy thinking
The litre thing wont make any difference if you have a mixing bottle. It has a fill line for the gas and then the different level fill lines above that depending on what ratio of mix you want. You simply add the oil to the gas until you reach the desired ratio marker. They have 25:1, 32:1, 40:1 50:1.
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Old 05-03-2010, 11:59 AM   #17
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The mixing bottles would be better if they were 700ml or 1400ml then you would be mixing 1 or 2 full tanks of fuel rather than 1 full tank + less than half of a second tank Just a thought
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Old 05-03-2010, 03:40 PM   #18
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you guys just need to buy Ratio Rite cups with lids.

they have us and meteric measures on it.
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Old 05-03-2010, 04:55 PM   #19
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Here's the mixing bottle I got. They are a couple of quid of ebay or from model shop.
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File Type: jpg 5011759903691_001c_v001_zp.jpg (7.1 KB, 14 views)
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Old 05-14-2011, 05:11 PM   #20
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Quote:
Originally Posted by dwarfy View Post
Here's the mixing bottle I got. They are a couple of quid of ebay or from model shop.
hi guys , when mixing petrol and oil they is one thing i don't get, i got a mixing bottle like the one in the picture ,so if i wanted 50/1 i put less oil in and if i wanted 25/1 i put more in which doesn't add up to me because 50 parts oil must be more than 25 ?,what i have been doing is put a two stroke oil bottle (the one for still saws) and then fill with unleaded and that should be 30/1 ,this makes my head hurt .........................phil
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Old 05-14-2011, 05:39 PM   #21
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when your mixing fuel its 25 parts gasoline to 1 part oil, not the other way around. think of it this way, 25:1 is half as much gasoline to the same amount of oil as 50:1.

for mixing i picked up a kitchen measuring cup, marked it every 40ml. 40ml of oil for 1l of fuel is 25:1.
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Old 05-17-2011, 04:40 PM   #22
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I have a ratio rite cup. I can easily mix any ratio I want by filling the oil to the desired ratio line for the amount of gas I'm mixing. They don't have a line for 25 to one, so I just fill it to the 50 to 1 line for a gallon, and I only put in half a gallon of gas. Here's a link to the ratio rite cup at DDM.http://www.davesmotors.com/s.nl/c.88...t.A/id.3350/.f
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Old 05-17-2011, 04:48 PM   #23
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i just put 160ml of oil with 4 liters in my petrol can! i mix it all in one go.. not had any probs in doing it that way.
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Old 05-17-2011, 05:40 PM   #24
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i just put 160ml of oil with 4 liters in my petrol can! i mix it all in one go.. not had any probs in doing it that way.
Here in Norway we use 5% oil of good quality on tuned rc-engines like Panolin, Klotz or Putoline oil.
In 5 L. gasoline we mix in 2,5 dl good quality oil.

Not tuned engines we use 4% oil .
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