Q: How many microns should high temperature boron nitride be used in gasoline and diesel to reduce friction and enhance lubricity? Is there a general addition ratio?
A: For lubrication, large particle size boron nitride (C, D, E type) is recommended, but the larger the particle size, the easier it is to settle. The specific adjustment is made according to the formula. The thermal conductivity is biased towards small particle size.

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