Honda HCF-2 CVT Fluid VOA

Dec 23, 2020
This VOA was taken from 5 different brand new 1 qt bottles. I poured about 20% of the sample container capacity from each bottle. Following the VOA (for direct comparison) is the UOA I took from our '18 CR-V. I've heard that a good rule of thumb is if the UOA TAN is 3x or less that of the VOA TAN, then you didn't push the fluid too far. Going from 0.4 to 1.3 looks like I'm right in that range.

18 CRV CVT 100521.png
Aug 22, 2009
Pittsburgh,PA U.S.A.
Interesting idea, about checking the TAN of the used Honda HCF -2 CVT fluid. While I am not well versed in anything regarding how to judge that fluid, one of my concerns was the obvious amount of fine particulates in mine when I did drains and fills on my 2016 Honda CR-V, at 25,000 and at 26,000 and at 27,000 miles +/- up to a few hundred miles depending on when I could get around doing it. I kept about 8 oz from each drain and could send some of them out for a TAN analysis if that is really a valid way to get a handle on the state of the fluid.

There certainly is a big difference in the amount of fine particulates in the fluid that can be seen by shining a good flashlight into the bottom of the glass jars I have each sample in.

Maybe someone with additional knowledge can verify the importance of the TAN in regard to the state of this type of fluid for this application? If so I would be interested to know more about this, both in regard to the samples of used fluid I have, and to how it can be used to determine how often to do a drain and fill.


Staff member
Jun 5, 2002
Iowegia - USA
This fluid is not shear stable as compared to the New Oil sample as the 100C viscosity dropped a full 2 cSt. The OP was wise to include the VOA for comparison.

When trending CVT transmission lubes we usually start getting concerned when the TANUOA nears 4XTANoriginal.

Overall not a bad report for an OEM CVT fluid but it is time for a fluid change.
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