Originally Posted By: 05ChevyI5
Regane is more effective every 4-5K miles. Seafoam can be used in small doses with every fill-up to maintain cleanliness of your fuel system.
+1....except I use RedLine Sl-1 (1.5 to 2 0z.) every fill-up to maintain a clean fuel system.
In addition I use MMO (3.5 oz. per 10 gal fill-up).
This combo works great in my vehicle....running smooth and a slight increase in MPG.
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03' Ford Focus (2.3L Duratec) / 94,800
M1 5w20EP/ M1 EP102 Filter/ OCI: 10,000 +/-