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- 2003 Mazda Protege5
Do you run the Seafoam for a few minutes, then change? I've read in another thread about the "seafoam treatment" (1/3 crank case, 1/3 gas tank, 1/3 booster line) and then needing to change your oil pretty soon after the fact? But some did say they left the seafoam in for days and longer..?