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| Feature | XTM Miracle Thunder | Sea Foam | Lucas Fuel Treatment | | :--- | :--- | :--- | :--- | | | Complete system restoration (fuel + upper engine) | Deep carbon solvent | Upper cylinder lubrication | | Fuel Economy Gain | High (2-4 MPG typical) | Moderate (1-2 MPG) | Mild (mostly stabilizes) | | Engine Noise Reduction | Noticeable | Slight | Significant (due to heavy oil) | | Emissions Reduction | Excellent | Good | Fair | | Best For | High-mileage restoration | Deep cleaning before storage | Ongoing basic protection | xtm miracle thunder