Proper way to UOA 3 different oils?

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513
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Funny Farm
I'd like to compare 3 different oils in my truck. What's the proper protocol for that? I was thinking do 3K on X and Send it in, do 3K on Z and send it in and then 3k another Y and send it in. But I got 1 person on here saying that's not right or gonna tell me anything. so I wana know the proper way to UOA test 3 oils.
 

Bill in Utah

Staff member
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12,849
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UT
quote:
Originally posted by Toy4x4runner: I'd like to compare 3 different oils in my truck. What's the proper protocol for that? I was thinking do 3K on X and Send it in, do 3K on Z and send it in and then 3k another Y and send it in. But I got 1 person on here saying that's not right or gonna tell me anything. so I wana know the proper way to UOA test 3 oils.
If it was me I'd do the following; Running #1 oil. Oil A. After the 2nd Oil change using that oil, do a UOA. Then change to oil #2. Oil B. Use that 2 times and UOA. Same with oil #3. So, You want the first run with the different oil to sorta flush and UOA the 2nd one. I'm confused.. [Cheers!] Take care, Bill [Coffee]
 
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2,233
Location
Wisconsin
A commonly accepted practice is to run a flushing oil, in between each run of oil that is tested/analyzed. But my comment is why make the process so complicated if your goal is just to find an oil that performs well for your driving style and your engine? Head over to the UOA forum & find the wear metal averages for your particular engine. This establishes a baseline for any motor oils that you may decide to run a future UOA on.
 
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2,233
Location
Wisconsin
Well, use a simple search string such as "Toyota 3.0" and several will show up. Toyota 3.0L UOA #1 Toyota 3.0L UOA #2 Toyota 3.0L UOA #3 The wear metals line up in this manner for these 3 reports:
code:
Aluminum	3	2	2
Chromium	0	0	1
Iron		11	5	9
Copper		9	8	3
Lead		4	0	6
Tin		0	0	0


  

Use a weighted average, midpoint, etc. to generate the goal numbers. I'd pick something like: 2 1 8 8 5 0 Whatever the method, Toyota engines typically do not throw alot of wear metals, so look for the results to always be single digits! [Smile]
 
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