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In Minnesota we have a 5% bio blend, so lubrication of the fuel system is not a primary concern for me most of the time. However I use fuel treatment on a regular basis. I've used Diesel Kleen mostly over the years but this year I've tried two others. Howe's premium treatment (forgot the name), not the regular stuff. Went through two bottles of it and it seemed to help the engine run smoother and get better fuel economy than the Kleen. I just started using another brand a few weeks ago. XDP Diesel Power Plus. So far I'm quite impressed with it. It's mail order for me. I needed a few other things so I ordered a couple bottles of summer and winter formulas. Cost per gallon is lower than anything else I have seen. It is one of the few addatives I have seen that include a biocide. My Duramax runs smooth and strong with this stuff in the tank. If you get the chance to try some, I'd reccomend it. XDP is a diesel performance shop. This is not XPD (maker of opti-lube).
181,000 miles and still running strong.
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