Last summer Aimee Curl dug into the battle for biodiesel moral superiority and the march toward saving the environment, or weening ourselves off mid East

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Go green, void warranty

One of the pitfalls of alternative energy.

Last summer Aimee Curl dug into the battle for biodiesel moral superiority and the march toward saving the environment, or weening ourselves off mid East oil depending on your political view, goes on. Today, the Seattle Times published a list of all the locations currently serving up some form of biodiesel.

Most of the blends are B20 or above (a 20 percent mix of biodiesel and regular diesel). But filling up at any of those stations may void your engine warranty on that new F-250.

Ford spokesman Said Deep says anything over B5 will void a Ford warranty. Other car owners should check their manuals.

"Are we looking at going above that? Absolutely," he says. But for now, if you're hearing a weird clank in the engine, you might want to steer clear of alternative fuels until you get it checked out. 

Not that the warranty ever covered much to begin with. 

 
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