old gas

[James TenCate <jtc@ccwf.cc.utexas.edu>]

I've got a TR6 that's about to be started again after about a year
of sitting around.  My question is about the gas in the tank.  The
tank was filled just before it got parked.  Has the gas likely turned
to varnish?  Is there anything I can add to the tank to help dissolve
the varnish and still let the car burn it off?  I'd hate to drain the
tank...

Thanks,
jim