Have you used truffle oil before. In my experience, it's a waste of money. Any relationship between the truffle oil and an actual truffle appears to be slight. I gave up on the oils and bought truffle salt. Now the salt has plenty of genuine truffle flavor and smell. Specifically, I use FungusAmongUs truffle salt.
When I say any relationship between truffle oil and a truffle is slight, what I mean is that, for almost everything called "truffle oil," no truffle was harmed in the making, because they are made purely with chemical compounds meant to smell like truffles. These are indeed some of the compounds found in actual truffles, but so does Tang have some compounds found in orange juice. And it's quite easy to use a tiny bit of truffle to justify a claim that actual truffles are used in one or another product.
I know I haven't found a truffle oil I thought was worth messing with, but the salt hits you as soon as you open it. I don't know if those bits in with the salt are bits of actual truffle, but they're sure doing something right with the salt.
Try both yourself. You'll see.
"Kitchen duty is awarded only to those of manifest excellence..." - The Master, Dogen