Yes canola oil infused with mushroom spores. The concept was introduced by Paul Stamets. You can find his product at Fungi Perfecti. This year I am trying pearl oysters next year...shiitakes. Fall is the best time for shiitakes. Oysters are less demanding.
My neighbor and my father were dubious about using canola oil for chain lubricant on the saw...as an alternative, I simply tried the technique using a paint brush. I ran the saw using the canola mushroom oil as a lubricant for most of the firewood cutting season...no problems.
As for the results...it looks promising. For landowners with woodlots...right now this technique appears to be much less complicated as a means to raise mushrooms for personal consumption and maybe for sale.
Here is a photo of the top of a sweet gum stump/stool inoculated with the chain saw in late Feb. I removed the top for the picture...a slice is taken off the top and then put back on top the stool to maintain moisture to help the mushrooms grow.
http://www.redbayfarm.com/Shiitake.htmlI didn't take pictures of a red maple stool which has numerous sprouts and on which the mushrooms seem to have taken hold. I also used the technique on two different types of oak.
Only time will tell. Cant wait to post some photos of stools with mushrooms and new growth...oysters only eat dead wood.