I think I'll try a tank or 2 of 89. My Charger RT is suposed to run 89 but it seems to stumble alot. Very inconsistant. I started running 93 in it and it is much smoother. I don't think it added power, but it deffinatley added performance by running smoother. In fact the only time I notice it runs like shit is when the wife fills it up. I asked her the other say and she said she put 89 in it. So...... We had the conversation AGAIN about running 93 in the Charger. Now I know that the Hemi is a real motor, and was never in a mini van, But who knows, maybe it will help.