Hey guys & gals, I have an 03 400e. The manual states to run premium gas only and I think this has to do with the gasket thickness and compression etc. Can anyone tell me what the possible long term effects of running lower octane fuel would be? The reason I ask is, I know I have run at least two or three tanks of the lower octane pump gas(that I know of) thrue it and I'm curious what kind of damage it can/will cause. I sure would appreciate some input. *** little story.*** Last weekend I had to go out of town. When I came home the wife heard the garage door open. She scoops up the little guy and opens the door to the house. I promptly get out of my truck, walk around to the other side and give my DRZ a hug and a kiss, told her I'm home and everything will be ok. then I turned around to the door slamming in my face. I couldn't stop laughing. I made it up to her, I took her out to dinner and she got over it!!!!