Ya, especially when you take some turns. I live in the backwoods and getting to the highway I have to trek through the Frederick County version of Pikes Peak. I watch my gas gauge as I go through there and it has 2 settings throughout.... 1/4 tank - 3/4 tank, haha. Clearly, it looks as though we have a crappy old school floater sensor in the tank that likes to slosh around. The more your VX moves side to side (turns) the more that senor is gonna get seasick.