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Additives for Petrol
Additives for Diesel
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STP Racing History
What do STP® Oil Treatment products do?
Motor oils are carefully formulated lubricants that perform many important functions, including cooling engine parts, keeping them clean, and protecting them against rust, corrosion, and wear. One of the most important functions of oil is providing lubrication by forming a cushion between moving parts to help them slide more easily. This reduces metal-to-metal contact and friction — a major contributor to heat, wear, and premature aging of engine parts. STP® Oil Treatment fights this metal-to-metal friction by providing a thicker cushion of oil between moving engine parts, thus helping to protect against engine wear.
Should I use STP® Oil Treatment products before or after an oil change?
STP® Oil Treatment can be added at any time. For maximum results, it’s best when added to fresh oil in a warm engine right after an oil change.
Why does STP® make two different oil treatments? What are their differences?
There are two separate and distinct STP® Oil Treatment products:
STP® Oil Treatment (in the blue bottle) helps protect against engine wear with a high-viscosity formula, which fights metal-to-metal friction by providing a thicker cushion of oil between moving engine parts. It can be used in all cars, trucks and SUVs.
STP® 4-Cylinder Oil Treatment (in the red bottle) also helps protect against engine wear by increasing oil viscosity, which provides a thicker cushion of oil between moving engine parts and reduces metal-to-metal friction. It counteracts oil thinning and also contains additives to boost motor oil’s anti-wear protection. This product is optimized for 4-cylinder engines.
Where does sludge come from?
Sludge is a thick, sticky residue that can form inside your engine through a combination of combustion by-products (oil oxidation residue, carbon and water). Water condenses as a result of a hot engine cooling down. The oil mixes with the resulting water and forms a thick sludge that sticks to the engine parts. Frequent cold starts and short trips contribute to this condition by not allowing the engine oil to heat up enough to vaporize and remove the water. Sludge is detrimental in that it can clog key oil passages such as oil drain-back holes and, in some cases, block the oil pickup screen in the oil pan, causing engine oil starvation (i.e., not enough oil). STP® Oil Additive products contain detergents, which can help suspend sludge in the motor oil and prevent it from accumulating inside your engine.
Do STP® oil additives cause sludge?
No. STP® oil additives contain detergents, which can help suspend sludge in the motor oil and prevent it from accumulating inside your engine.
How often should I use STP® Oil Treatment products?
STP® Oil Treatment products can be added at any time and are best added at every oil change. They should, however, only be used once per oil change.
How much motor oil will the STP® Oil Treatment products treat?
The 15 fl. oz. STP® Oil Treatment products are designed to be mixed with 4—5 quarts of motor oil.
Why do some car manufacturers recommend against the use of oil additives in my car?
Many car manufacturers state that after-market oil additives are not necessary, even though they sell their own brand of oil additives. Some after-market oil additives contain corrosive chemicals, including chlorine-based lubricating compounds that may be harmful to internal engine parts. STP® products do not contain any corrosive components and are safe for use in all engines.
Do you have an oil treatment for winter?
STP® does not manufacture an oil treatment specifically for winter use. Both the STP® Oil Treatment and STP® 4-Cylinder Oil Treatment can be used year-round. If you prefer a lower-viscosity formula, use STP®4-Cylinder Oil Treatment, which can be used in cars, trucks and SUVs with engines of any size.
Can I use STP® Oil Treatment in my manual transmission?
STP® Oil Treatment has been used successfully in manual transmissions, gearboxes and differentials at a 10% treat-rate by volume (i.e., 90% oil and 10% Oil Treatment by volume). Do not overfill.
Are STP® oil additive products safe for two-cycle engines?
The STP® oil additive products have not been tested and are not recommended for use in two-cycle engines.
Are STP® oil additive products safe for four-cycle engines?
The STP® oil additive products are specifically designed for use in four-cycle engines.
Can you use STP® Oil Treatment products in your home heating oil?
We do not recommend using STP® Oil Treatment products in home heating oil.
How does STP Oil Treatment work?
STP Oil Treatment for Petrol Engines
provides extra protection against engine heat and allows oil to maintain key lubricating properties for longer to keep the engine going strong until the next oil change.
Can I use STP Oil Treatment if my engine oil is old?
No, we recommend the oil is changed before using
STP Oil Treatment
or in-between vehicle manufacturer recommended oil change intervals.
If I use STP Oil Treatment, can my service intervals be extended?
No, we do not recommend extending your service interval using STP Oil Treatment.
How does STP Engine Stop Leak work?
STP Engine Stop Leak
is formulated with a special agent to renew polymer seals and gaskets damaged by the heat of normal engine operation, which can otherwise result in oil leaks and expensive mechanical work.
STP Engine Stop Leak
will also increase the protection offered by the existing engine oil.
Does STP Engine Stop Leak stop all engine leaks?
STP Engine Stop Leak is designed to rejuvenates seals and gaskets, it will not stop all leaks e.g cracked engine block, leaking oil pan etc.
There is smoke coming from my exhaust; will STP Smoke Treatment solve the problem?
Yes, dependant on the colour of smoke. If the smoke is blue in colour, STP Smoke Treatment will help. Blue smoke signifies an issue with oil burning. Possibly due to worn piston rings, valves or cylinders. Or maybe too much oil has been added?
STP Smoke Treatment
may help rectify worn piston rings etc. but would add to the issue if too much oil was originally used and then topped up with
STP Smoke Treatment
© 2016 The Armor All/STP Products Company, a Spectrum Brands company