Update on the second fuel tank.

I have put over 400 miles on the Commander since installing the second tank and here are some of the statistics and results.

Last night the two gauges were each reading 1/2 tank, so I have reached the point where the back tank is no longer feeding the front tank automatically due to gravity. I turned the timer on and the back tank transferred gas to the fromt tank. After transfer the front tank is now full again and the back tank has just under 1/4 tank. The shows that the overflow of fuel returned to the back tank.

Based on the remaining fuel I believe that I have a range of between 700, (easy), and 800, (pushing it) miles on the two tanks. Since my tires are larger than stock I actually have another 5% or so different than the computer calculated miles, (so 735 to 840 miles). Even with this range the miles to empty from the computer would still keep you out of trouble. The extra 5 gallons on the back will be for anyone else that needs gas. I am getting between 14 and 15 miles per gallon.

One other intresting fact. The other day while coming back from town, I looked at the main gas gauge and it was full. A few minutes later I heard the warning tone and looked down. The gauge read empty and the check engine light was on. I pushed distance to empty button and it said "0". I knew that I had a full tank. When I got home I did two things. I loosened the gas cap and felt a whosh of air going into the tank. It seemed to have a vacuum in the tank. I also disconnected the ground cable from the battery for a few minutes. I restarted the Commander and everything was back to normal, full tank, no check engine light and a reading of 328 miles to empty. Jake at the gas tank place had said that I might get a vacuum condition in the tanks and maybe that is what happened. It only happened that one time, and I will see if it reoccurs.

After filling it a few times and recording accurate odometer reading I will post more accurate numbers.