In petrol engines: A puff of white smoke out the exhaust in the morning is a sure sign of worn valve seals allowing oil to seep past the valves into the combustion chamber when the engine is not running.
eBay
1pcs Automatic Open-Close Oil Bottle Leak-Proof Convenient Pouring Oil Bottle Household Kitchen Oil Jug Kitchen Utensil
Aliexpress UK
Due to the additives contained, rubber and plastic seals in steering gears receive optimal care. In addition, holes and ducts in the gears are cleaned and the performance of the oil is revitalized. The noise levels of power steering systems are reduced.
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Leak-proof Glass Oil Bottle Automatic Opening And Closing Oil Tank Meterable Kitchen Gravity Oil Sauce Vinegar Seasoning Bottle
Aliexpress UK
Wynns Professional Formula Engine Oil Stop Leak Treatment Additive 325ml.
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Oil Spout Stainless Steel Oil Bottle Pourer Leak-proof Olive Oil Dispenser Vinegar Bottle Stopper Speed Pourer Dust Covers
Aliexpress UK
MSI Oil Stop Leak can repair minor oil leaks in the engine, gear box (manual and automatic) and power steering units. Rejuvenates worn and hard seals and lubricates all working parts, prolonging the life of the units.
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10PCS Oil Bottle Spouts Head Oil Vinegar Bottle Stopper Leak-proof Oil and Vinegar Dispenser Wine Stopper for Most Bottles
Aliexpress UK
For use in all car and light van petrol and diesel engines gearboxes and axles. Add contents of bottle to oil in the engine gearbox or differential. All cheaper oils and the 'synthetic' component of part-synthetic or semi-synthetic oils are hydrocracked mineral oils.
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Stainless Steel Oil Dispenser Bottle - Leak-proof Olive Oil Decanter for Kitchen Use, Olive Oil and Cooking Liquids Kitchen
Aliexpress UK
Stops and prevents oil leaks without dismantling Revitalizes rubber and neoprene seals of crankshaft, camshaft and valve stems Compatible with all mineral, synthetic, single and multigrade oils - suitable for regular and low SAPS applications
eBay
Oil Resistant Soy Sauce Bottle Vinegar Sesame Oil Container Olive Oil Spice Jar Bottle Leak Proof Kitchen Storage 200ML
Aliexpress UK
This advanced oil leak stopper is a high-performance solution designed to prevent and stop engine oil leaks caused by the deterioration of rubber and neoprene seals. By eliminating oil leaks at the source, this solution reduces oil consumption, protects engine components, and ensures a clean and efficient operation.
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Kitchen Supplies Leak Proof Gravy Durable 500ML\750ML Oil Can Stainless Steel Oil Dispenser Soy Sauce Olive Oil bottle
Aliexpress UK
Liqui Moly Engine Oil Stop Leak 300ml regenerates hardened rubber and plastic engine seals to help stop oil leaks and prevent oil spots under the vehicle. It can reduce oil consumption, quieten engine noise, and counteract oil dilution.
eBay
Kitchen Cooking Olive Oil Jug Leak Proof Glass Oil Tank Automatic Flip Oil Dispenser Bottle Drip Free for Easy Pouring
Aliexpress UK