Ratio rite shows different amount for 32:1 vs fluid ounces?

Related:
Create New Tag

9/7/2017 12:20 PM
Edited Date/Time: 9/7/2017 12:55 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

|

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

|

9/7/2017 12:41 PM
Edited Date/Time: 9/7/2017 12:48 PM

Paw Paw wrote:

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

Paw Paw

.......

|

9/7/2017 12:47 PM

Paw Paw wrote:

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

Paw Paw

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

|

9/7/2017 12:51 PM
Edited Date/Time: 9/7/2017 12:53 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.

|

9/7/2017 1:07 PM
Edited Date/Time: 9/7/2017 1:43 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

9/7/2017 1:13 PM

MotoTribology wrote:

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 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.

|

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

9/7/2017 5:17 PM
Edited Date/Time: 9/7/2017 5:22 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.

|

9/8/2017 8:42 PM

MotoTribology wrote:

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.

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