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Who has done a balance shaft delete? What kit is best? Please help! Just like the title says. I'm doing a BSD soon with the next oil change and want to know what kit is the best? Will the quality of the kit range from manufacturer to manufacturer or are they all pretty much the same? Going...

i seen a video on you tube that shows a 10mpg increase in mileage by adding pure acetone to each tank full. don't remember the amount but it looked like half a standard size coffee mug. im also wondering if this will in anyway hurt the engine or oxygen sensors in the long run. if this acetone is...