Hexagonal boron nitride as an additive

Points
62
Location
Topeka, Kansas, USA
Car
1998 Chevy Tahoe
Just realized that one of my happier yet very out-of-band habits hadn't made it here yet. For several years I have been adding one ounce of 2.5-micron HBN to oil changes in my '98 Chevrolet Tahoe. Usually I mix it with one of the quarts of oil. Definite improvement. Feathering the gas instead of a light press. Lots of little engine metal noises vanished. Hadn't done it the last year or so, but did today, and like wow. Very nice indeed.

The last time I tried to find research reports about this, I found just one article, about a much bigger diesel engine, and it gave a ratio that I found roughly approximated one ounce to five quarts, so I have been using it. I Googled it just now, and found a lot more than one article :)

The 2.5-micron is a different challenge. This time around I researched pore size of oil filters (the stuff has to flow right through), and found reports of a wide variety of pore sizes, all of them a lot larger than 2.5-micron except very expensive and rare ones. 10- or 15-micron actually looks like it would be more effective in the pores of steel if there were no filter involved, but I most definitely am not remotely close enough to the engineer needed to even think about it :)

The 2.5-micron HBN to which I have easiest access, by the way, is bullet lubricant on Amazon :) There is at least one or two sources of several different sizes on AliExpress, and I imagine there are a lot of others if one knew more about sourcing it. One nice thing, HBN is non-toxic, women's cosmetics are mostly HBN.
 

TCJBOLDIE

Moderator
Staff member
Points
757
Location
Brisbane
Car
2011 Honda FN2
Am always interested in new products or info so it would be interesting if thate was a before and after dyno chart showing any improvements.
 
Points
62
Location
Topeka, Kansas, USA
Car
1998 Chevy Tahoe
Yup, so would I. I can't come close to affording it though. There is a lot of interesting reports out there now. For example:


 

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