I drove it today and it definately helped. After the mess, you were right, I ended up adding a gallon and it seems to definitely be working now. I noticed that my temp guage started to dip a few times during the drive, I assume do to low fluid level and air. After adding a gallon no problem. Thanks. PS, anyone recommend a good heat exchanger for my rear tank? I saw where someone used a stainless steel flex line for a gas range. I tried it and it seems to work but I worry it may not produce enough heat.