My 85 has a small 'regurgitation' problem, as well.  It's not as bad as
some seem to have it, though-- a 'ploot' of a few tablespoons when the pump
hits the full mark.  But I don't like having dribbles of gas down my paint,
and getting hit with on the shoe every so often.

 A couple months ago this thread came up and someone suggested stopping the
pump before it hit the full/auto shutoff point and letting the air out.
I've been doing that-- just wiggle the nozzle up so there's some room
between it and the flap-- for a couple seconds as it approaches full, and
then letting it fill the last half gallon or so on auto. And no more wet
burps.

Sounds like this doesn't work for everyone, though.  :-(    Just thought
I'd be counted as someone it works for, though.

--Patrice
85GL "VanaBlue"
in WA state, land of Self-Serve  (though I put a NO TOPPING TANK EVER!
post-it on the gas cap when I went to Oregon last week)