Can i use old oil?

[Re-run]

I used to race motocross about 7 years ago but got out of it due to injury and having a kid, i recently got a few quads to have fun on and ran across some of my old Klotz Benol gas mixture! One unopened and three opened but lid on tight and almost full! Like i said they are 5-10 years old, but have been in a cabinet with a lid on the bottles.

Are my Klotz Benol's usable?

 

[Herpderplol]

I wouldnt think oil could go bad, but now I am interested in knowing this answer as well...

 

[Blaaster]

As far as I am aware oil in an unopened , sealed container has no use by date.

I would be reluctant to use oil from an open container, even though it may be perfectly fine.