|Posted: October 13 2006 at 19:45 | IP Logged
I'm guessing like everybody. The lobbyists and legislators never got the answers before they started passing laws - again. But here's my thinking.
1. Fumes are worse than fuel, which says the tank should be full. (I don't think shrink wrapping makes a difference unless you are leaking!)
2. E10 attracts water and will pull it from the air. (Makes me wonder why we put alcohol based gas line antifreeze in gas all those years). Anyway, if the tank is full there is less air to pull from. That's 2 for full.
3. For real old fiberglass tanks that may have a problem with E10, they should probably be empty so they don't dissolve the tanks - especially if there are seams up high, as may be common.
4. As far as the Ethanol and gas separating, well, that may say to leave the tank almost empty. They may still separate, but there will be less Ethanol. But, I have to wonder if they will remix when you shake everything up in the spring. Anyway, the E10 is heavier and will be at the bottom and pumped out first if it stays separated. That may cause some hard starting and running, but it will get rid of the problem early on.
Finally, I've heard of some particularly paranoid folks who are planning on taping over the vent fitting so the moisture can't be sucked in by the Ethanol. Bad idea. First, and best, it won't work. It gets hot in there - 80 -90 degrees. The air in that tank will heat up and want to go somewhere. You probably can't seal the vent, but if you could the pressure would try to blow a hose off - probably the vent hose - or find another way out. Nothing good.
I think I'm going to fill mine up.