Oil does not lose its viscosity in storage unless it is contaminated. The
additive package may have settled a little, just shake the container before
you use it. Oil does not 'go bad' but the additive package can have
problems.


"World Traveler" wrote in message
...
The bottle was opened.... Do you think the oil has lost its viscosity ?
Does
oil go bad after time ?


"Gfretwell" wrote in message
...
I just found 2 gallons of 2-cycle oil for my Mariner outboard. It is
about 2
year old.

If they are sealed bottles of TCW-3, sure it's OK. If the bottles are
open
YMMV.