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JBecker 72 JBecker 72
9/7/2017 12:20 PM

Possibly a very dumb question, but why do all of my measuring cups read different between the ratio lines and the fluid ounce lines? Example: the 32:1 line is about half an ounce lower than the 20 ounce line. 32:1 = 32 ounces of gas (1 quart) : 1 ounce of oil. 4 quarts in a gallon so 4 ounces of oil per gallon. 4 ounces X 5 gallons = 20 ounces of oil. What gives?

Edit: so it turns out this one is just poorly made.

Photo

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Paw Paw Paw Paw
9/7/2017 12:30 PM

That does not look like a ratio right cup to me. You could be way off using that set up.

Paw Paw

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JBecker 72 JBecker 72
9/7/2017 12:41 PM
Paw Paw wrote:

That does not look like a ...more

.......

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JBecker 72 JBecker 72
9/7/2017 12:47 PM
Paw Paw wrote:

That does not look like a ...more

Aww hell, you're right. I've been using this other one because it holds enough to mix 5 gallons at a time.

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JBecker 72 JBecker 72
9/7/2017 12:51 PM

Well, good news is I've been using the ounces mark. I poured 10 ounces of water out of the ratio rite into this one and got 10 ounces. Did it again and was right at 20.

10 ounces in ratio rite is same height as 32:1 for 2.5 gallons.

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MotoTribology MotoTribology
9/7/2017 1:07 PM

That is weird since it should be the exact opposite. It takes 20.6 oz. to get a true 32:1 ratio with 5 gallons of gas. To get the true ratio you need to factor in the additional volume the oil adds. So 640 oz. becomes 660.6 oz. total because 32:1 of that is 20.6 oz.

I can do anything, I'm an expert.
MotoTribology.com - Motorcycle Lubrication Education

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JBecker 72 JBecker 72
9/7/2017 1:13 PM
MotoTribology wrote:

That is weird since it ...more

I was kind of thinking along those lines when I made the thread. Just didn't bother to do any math. Figured there was something I might be missing.

FWIW the brand I took a picture of is a Bikemaster.

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Acidreamer Acidreamer
9/7/2017 5:13 PM

Real scientists use cylinders and beakers anyways. Cant trust them bikemaster chinese ones

2009 Kawasaki KX450F
2009 Kawasaki KX250F
2002 Suzuki GSXR 600

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YZ125H1 YZ125H1
9/7/2017 5:17 PM

I think I have the same measuring cup. It was a bit confusing at first because it has different mix ratios depending on how much gas you are mixing. (1, 2 and 5 gallons IIRC). Never noticed anything with the fluid ounces I will have to check it out this weekend. It wouldn't surprise me if it is wrong. Never used the FL OZ mark just the ratio marks for me which was 40:1.

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ToolMaker ToolMaker
9/8/2017 8:42 PM
MotoTribology wrote:

That is weird since it ...more

Um, no.
TM

www.alljackedupinc.com home of the Switch Hauler, the only modular hauling system www.sprocketstuff.com home of the Counter Sprocket Tool

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