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'18 M3HGTP Eternal Blue
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I ran a VW TDI for just shy of 20 years.... that site is a whole lot of snake-oil. Think about what's required for combustion, fuel, air and ignition (which is compression for a diesel). If you're just trying to atomize the fuel so it mixes with the air and burns completely, what Difference does it make if there's some "absorbed air" in the fuel? Similarly, while I ran a water separator on both that car and a Sprinter diesel van for a combined ~350k miles, I never saw more than an ounce of water over 20k miles. I guarantee that all of that water came from one source each time, pumped in with the fuel from a mostly unused diesel tank. Same reason I won't own a Premium fuel vehicle (they're mostly unused and have the most contamination within).
 
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