Flash points for oil

      1) If you're using a "Dolphin" (brand) or other stainless
steel-cored sawblade, create a 40:30:30 solution of your coconut
oil with water and glycerine and shake well before refilling your
saw's sump reservior. This'll enhance the surfactant (wetting)
ability of the oil, and thereby help reduce that sparking you've
seen. (The glycerine enables the miscibility of the former two.
Since neither the glycerine nor the oil are as prone to
evaporation as is the water, and since all are well tolerated by
those of us with M.C.S., you'll be able to cover all bases pretty
easily.) Whenever the  watery mixture runs low, just top it off
with water from a bottle kept nearby for just such an occasion.
(FWIW: I find that those pump-top shampoo and lotion bottles are
ideally suited to this.) You'll also appreciate the glycerine's
catalytic ability to intermix with the  oil and water when time
comes to clean up the area from overspray! > 

What a great idea! Now I am torn betwween adding the glycerin or
leaving as it is – one of the wonderfull things about using the
coconut oil is that it hardens in cool or cold temperatures – since
I keep it in a pan (to make it easy to take in and out of my
saw,and so I don’t use so much) that means I can turn the solid
block out, upside down onto the kitchen counter and scrape the black
gunk off the bottom – the rock residue sinks very nicely to the
bottom leaving nice white coconut oil at the top – filtering
itself, in essence!

I wouldn’t recommend leaving your blade sitting in coconut oil
though, as I beleive it does have a little water in it.

Thanks for your very helpfull reply

Susan, an answer to you question on the flash point of oils is that
Peanut oil has the highest flash point of all of the vegetable oils.
The source of this was a cooking class in Chinese
cooking at the Culinary Institute of America in Hyde Park, New York.
Funny how chemistry doesn’t care what application you are applying
it to, the answer is usually the same.