Best Diesel Treatment: Reviewed and Ranked

Diesel treatments cover a handful of different jobs in one aisle: cetane boosters that bump combustion quality for smoother starts and a touch more power, anti-gel additives that keep fuel flowing in cold weather, and injector cleaners that strip the carbon and varnish off high-pressure common-rail injectors. Use an anti-gel any time temps drop below about 20°F if the station hasn't already winterized the pump — gelled fuel will strand you fast. The honest take: a quality treatment every few tanks pays off for hard-working diesels with high injection pressures, but cheap dumpings of generic additive into a healthy modern engine mostly just enrich the additive maker. Match the product to the actual problem.

Diesel Treatment

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Top brands making diesel treatment