Bears eat anything! They even like motor oil! Had one raid a logging site years ago, bit into and drank a gallon of oil! I always wondered how long it took to send that out the other end!
What Bender said. - even if they don't eat it, they will bite it. At an alpine lake here on the Peninsula, someone had flown in a plastic canoe, which I would use whenever I went there. After a couple years, a bear bit into it. Made a dandy livebox while I was using it fishing for rainbows in the lake. did have to bail once in awhile, or I couldn't re-catch the fish in the canoe.
At one time, I had a couple cases of 30wt within bear reach at my remote cabin. The old cardboard quarts. And some 2 cycle in plastic quarts, both of which a bear or bears liked to sample.
Fixed that by leaving a couple cans of aerosol bug spray in there with them. IIRC, only one of the bug spray was ever bitten, and that was the end of losing oil to the bear bites.
I now keep all such things above reach -after a bear bit into a 5 gal plastic can of gasoline. My watch bear that beds under the cabin overhang when I'm not there doesn't bother the metal stuff, tho he did crimp the propane line to unusability between this last summer and the summer before. Not on purpose- he was just trying to get into the cabin.