Our #1 Red Line pick
Top-ranked Fuel Injector Cleaner in our Red Line lineup, scored independently on effectiveness, health, and environmental impact. No paid placements.
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Red Line Synthetic Oil Corporation was founded in Benicia, California, originally focused on racing lubricants and fuel additives. The brand built its reputation in motorsport before expanding into consumer automotive products. Red Line was acquired by Phillips 66 and operates under their lubricants division, though the brand maintains its own identity and product development. The SI-1 fuel system cleaner and Water Wetter coolant additive are among the brand's most recognized consumer products.
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As an Amazon Associate I earn from qualifying purchases. Full disclosure
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