Additive ratio math

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Jun 5, 2003
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Apple Valley, California
For some reason I can't figure this one out.

The bottle contains 64oz and will treat 250 gallons. I have 5 gallons of fuel.

How much to add to 5 gallons?

250 gallons is 32000oz.

32000 divided by 64 is 500? 500 what? I'm lost.

Screenshot_20260117-180459.webp
 
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OK guys, I gots to tell you a true story about someone who could not figure out how much 2 cycle oil to put in gasoline.

Many years ago I was working for a local utility company trying to accumulate enough seniority to bid into a job where I could use my electronic engineering background. So, I was low man in the group because of lowest seniority, and was assigned to be a helper to someone with more seniority, but that about all he had going for him. He was by far not the sharpest pencil in the box. And God forbid if anyone tried to tell him how to do anything. We had a 2 cycle chainsaw and a red one gallon plastic gas can that had some extra space above the one gallon mark. The 2 cycle oil bottles said ( 32 : 1 ) on the front of the bottle in big print, and 8 Oz near the bottom. So, he fills the gas can to the one gallon mark and opens a new bottle of 8 Oz of 32 to 1 two cycle oil and dumps the entire bottle in. I watch that and don't say a word even though I know 32 : 1 x 8 oz = 2 gallons. I don't know if he caught a hint that he did something wrong when he saw me watching him, but then he opened another new bottle of 32 : 1 and dumped that in also. So, now that one gallon of gasoline is mixed with 4 X the amount of oil it should have. I never said a word.

We had a storm a few days after that and had to fairly quickly drop and remove a big tree to provide an access to install an emergency temporary universal big transformer trailer, in an area where it could be wired into the substation to get the area back to full capacity. Man did that chainsaw make some smoke.

About a week later he comes into work one morning and he's all upset. He says that he had to go meet with his son's teacher and she said that his son is no good at math.

Again, I did not say a word, but quietly laughed and thought, the apple does not fall far from the tree.


---------

^ True story. Name withheld.
 
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OK guys, I gots to tell you a true story about someone who could not figure out how much 2 cycle oil to put in gasoline.

Many years ago I was working for a local utility company trying to accumulate enough seniority to bid into a job where I could use my electronic engineering background. So, I was low man in the group because of lowest seniority, and was assigned to be a helper to someone with more seniority, but that about all he had going for him. He was by far not the sharpest pencil in the box. And God forbid if anyone tried to tell him how to do anything. We had a 2 cycle chainsaw and a red one gallon plastic gas can that had some extra space above the one gallon mark. The 2 cycle oil bottles said ( 32 : 1 ) on the front of the bottle in big print, and 8 Oz near the bottom. So, he fills the gas can to the one gallon mark and opens a new bottle of 8 Oz of 32 to 1 two cycle oil and dumps the entire bottle in. I watch that and don't say a word even though I know 32 : 1 x 8 oz = 2 gallons. I don't know if he caught a hint that he did something wrong when he saw me watching him, but then he opened another new bottle of 32 : 1 and dumped that in also. So, now that one gallon of gasoline is mixed with 4 X the amount of oil it should have. I never said a word.

We had a storm a few days after that and had to fairly quickly drop and remove a big tree to provide an access to install an emergency temporary universal big transformer trailer, in an area where it could be wired into the substation to get the area back to full capacity. Man did that chainsaw make some smoke.

About a week later he comes into work one morning and he's all upset. He says that he had to go meet with his son's teacher and she said that his son is no good at math.

Again, I did not say a word, but quietly laughed and thought, the apple does not fall far from the tree.


---------

^ True story. Name withheld.
I worked with various incarnations of that fellow. Because they were P. Engineers, they were paid way more than me, a lowly technologist.
 
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OK guys, I gots to tell you a true story about someone who could not figure out how much 2 cycle oil to put in gasoline.

Many years ago I was working for a local utility company trying to accumulate enough seniority to bid into a job where I could use my electronic engineering background. So, I was low man in the group because of lowest seniority, and was assigned to be a helper to someone with more seniority, but that about all he had going for him. He was by far not the sharpest pencil in the box. And God forbid if anyone tried to tell him how to do anything. We had a 2 cycle chainsaw and a red one gallon plastic gas can that had some extra space above the one gallon mark. The 2 cycle oil bottles said ( 32 : 1 ) on the front of the bottle in big print, and 8 Oz near the bottom. So, he fills the gas can to the one gallon mark and opens a new bottle of 8 Oz of 32 to 1 two cycle oil and dumps the entire bottle in. I watch that and don't say a word even though I know 32 : 1 x 8 oz = 2 gallons. I don't know if he caught a hint that he did something wrong when he saw me watching him, but then he opened another new bottle of 32 : 1 and dumped that in also. So, now that one gallon of gasoline is mixed with 4 X the amount of oil it should have. I never said a word.

We had a storm a few days after that and had to fairly quickly drop and remove a big tree to provide an access to install an emergency temporary universal big transformer trailer, in an area where it could be wired into the substation to get the area back to full capacity. Man did that chainsaw make some smoke.

About a week later he comes into work one morning and he's all upset. He says that he had to go meet with his son's teacher and she said that his son is no good at math.

Again, I did not say a word, but quietly laughed and thought, the apple does not fall far from the tree.


---------

^ True story. Name withheld.
Mixing was a lot easier when they had a clear window strip on the side of bottles. Now to get it right I just buy the single bottles for one gallon made by stihl. I feel for the guy, all my stuff smoked like a freight train too back when I was young and didn't bother reading the instructions on mix ratios. I thought one bottle was for one whatever gas can size you had. At least all that smoke kept the mosquitoes away. 🤣
 
I find the easiest way (for me) to think of these things is ratios and cross multiplication. 64oz/250 Gallons = x oz/5 Gallons

Then cross multiply so we get 64 x 5 = 250x. That is 320 = 250x. Divide both sides by 250. 320/250 = x = 1.28 oz.
 
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