Had to rebuild my carburetors today. Damn it was dirty!! They are saying now that the gas formulated for California is not great for the gaskets they use carburetors. Supposedly I'll have to rebuild it every 6 months since I drive everyday. We'll see.. The last time I rebuilt it was 2 years ago, so it's not to bad. I usually have to rebuild every other year and use a wix fuel filter also.