Since 1954, STP oil additives have been helping engines withstand the toughest conditions.
STP Ultra 5-in-1 formula is scientifically engineered to enhance your motor oil’s effectiveness.
It has been formulated to help maximize protection levels and performance.
Add one bottle to 4-5 quarts of oil during or between oil changes.
STP® Ultra 5-in-1 Fuel System Cleaner is safe for all gasoline engines.
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