Zella,

With B20 you should have no issues.
You might have to change the fuel filter after the 3rd or 4th tank of B20.
I would carry a spare fuel filter with you just in case you plug up the one on the tank.

I started to use B99 on my 95 with 140K on it with no issues. I pulled the fuel filter after the 2nd tank and there was nothing in it.