STP Heavy Duty Engine Degreaser 500ml STP Heavy Duty Engine Degreaser is a proven blend of powerful grease stripping and metal cleaning solvents, packaged for do-it-yourself use. It is designed to penetrate and dissolve heavy caked-on grease and grime to give the engine a professional clean. A powerful blend of grease stripping and metal cleaning solvents, STP Heavy Duty Engine Degreaser is designed to penetrate and dissolve heavy grease and grime to give your engine a professional clean up. * Suitable for car, lorry, van and tractor engines * Penetrates and dissolves heavy dirt and deposits. STP Smoke Treatment for Petrol Engines 450ml STP Smoke Treatment for Petrol Engines 450ml. Reduces exhaust smoke and lowers oil consumption. Excessive oil burning and exhaust smoking can occur in older, worn engines when motor oil enters the combustion chamber and is burned along with fuel. This condition, known as oil blow by, often results when friction and metal-to-metal contact have worn parts and created gaps between the cylinder walls, pistons rings and valve guide seals. STP® 64450EN Smoke Treatment provides a thicker oil cushion to help fill these gaps and reduce oil blow-by and smoking. STP® 64450EN Smoke Treatment used regularly helps. * Reduce exhaust smoke and engine noise. * Lower oil consumption. * Protect against engine wear.
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