A popular choice on the forums seems to be Lucas Fuel conditioner and stabilizer (my choice as well). Mind saying that i now run E85 most of the time. Since my car is presently in hibernation during the winter months i have a mixture of about 50/50 E85/Shell V-power though not for any particular reason. The conditioner is not supposed to clog up the pre filters, fuel system etc. I took advice from guys that have been running E85 and using Lucas for a while and have seen no adverse affects. My car will remain in storage for about six months. Other years when i only ran pump gas i never used a stabilizer and the car started up first time after storage never had a problem. That`s how i`ve done it.