Stp diesel oil

Stp diesel oil DEFAULT


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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.

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.

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.

No. STP® oil additives contain detergents, which can help suspend sludge in the motor oil and prevent it from accumulating inside your engine.

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.

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.

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STP® Diesel Oil is specially designed and formulated with viscosity index improves and anti-wear additives which have been tested in major diesel engines. Excellent for all diesel vehicles old or new.

STP Diesel Oil Treatment helps:

  • Protect against engine wear
  • Reduce oil consumption
  • Prevent piston deposits in the ring zone
  • Stop diesel fuel dilution, shear stable


One bottle of STP® Oil Treatment for Diesel Engines will treat 6 litres of diesel oil (5% treat rate). The entire bottle should be added to oil when the engine is warm (but not overfilled).


STP® Oil Treatment Diesel is not recommended for use in petrol engines.


Not suitable for use in Low SAP oils. Do not overfill.

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STP Motor Oil Review

Are you in need of motor oil to serve your engine the best? Great! The STP Synthetic Motor Oil with a mileage of 7000 miles between changing intervals protects your engine from wear. To learn more about the STP motor oil, check our detailed guide given below.

STP Motor Oil Review

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Overview of Features

STP oil review

This motor oil is generated scientifically to protect your engine from the harmful effects of wear, rust, and corrosion. It provides a consistent steady engine operation with less engine sound. Also, it maintains the creation of sludge and keeps the key engine components spotless.

The motor oil fulfills the requirements of ILSAC GF-5, API SN, and all the other API standards. Also, It manages the fuel economy with its affordable price. Although it requires more money than conventional oil, considering the performance and oil change intervals, it might be a pretty good deal for you.

It has an engine capable of covering a lot of miles before in need of oil changes. Typically, it can cover 7000 miles more or less. You may go for miles and the car will still feel as active and responsive as changing oil for the first time. Also, it gives good protection in cold and hot weather.

Additionally, this motor oil might save a lot of your money. Because you will not need to visit the garage frequently for repairs. However, you have to check your car engine if it has any problems from time to time. Otherwise, unchecked oil engine changes can cause complications in the engine and you might not know about it sooner.

Moreover, The wider and easy to pour spout prevents wastage by keeping the oil from spilling. It will keep your engine tidy.


STP oil specifications

  • Manufacturer: STP
  • Brand: STP
  • Viscosity: 5w-20, 5w-30, 10w-30
  • Vehicle Service Type: Cars


  • Useful for both gasoline and diesel engines.
  • Improved fuel economy.
  • Protects engine from severe effects of wear.
  • Cope against high temperature.
  • Steady engine operation and less sound.
  • Enhanced protection against rust and corrosion.
  • Wider, easy to pour spout.


  • More costly than conventional motor oil.
  • Not ideal for high mileage engines.
  • Purchase link:Buy STP Motor Oil at Amazon

    What Customers Say?

    STP Oil reviews

    Generally, the customers of the STP motor oil gave it a good review. They feel that it makes their car super good with smooth operation.

    After using, a customer said about the oil that he/she can cover 7500 miles consistently without changing the oils. He/She also used it for 190000 miles on his/her Ford Focus.

    Another customer said with a 5-star rating that he is using it for some time and used it for thousands of miles. He is happy with the product and will use it in the upcoming days to come.

    Another customer recommended the oil for older Cadillacs and said that she used it for her Cadillacs for around 35000 miles.

    An expert of synthetic motor oil Sam Bell said on the Angi website that longer service intervals can also be harmful as you will open the hood after driving for a long time. So, if your engine develops any complications, it poses a chance that you will not know about it for many miles.

    You may check out this review of the STP motor oil to know about it better – STP Motor Oil Reviews.

    Should I Switch to STP Motor Oil

    STP motor oil can be a good choice for you if you want your car engine to have a lower oil consumption and cleaner engine. It is generally good for both diesel and gasoline types of engines. It is specifically designed for four-cycle engines such as cars, trucks, SUVs, etc. The engine size can be any size. It is most frequently used in diesel engines. If you have a vehicle of diesel engines, then the STP motor oil will provide you the best performance in both hot and cold weather.

    How to Use

    How to use STP motor oil

    You can use the STP motor oil in a diesel engine conveniently as it can stand the high temperatures of the engine. It has thermal properties, which can cope with the higher temperatures of the engine. So, it can give your engine better protection than conventional oils.

    Also, the STP motor oil is good for 5000 to 7000 miles without changing the oil once. Some users also recorded that it can go up to 25000 miles before the oil changes interval. As it requires less oil consumption, you will only need 15 to 24 quarts of oil per year.

    You may take the help of the manufacturer’s recommendations and suggestions of your vehicle’s owner’s manual for having better performance.

    Alternatives to STP Motor Oil

    Alternatives to STP Motor Oil

    Valvoline Advanced Full Synthetic Motor Oil

    Valvoline full synthetic diesel engine oil is a good alternative to use instead of STP motor oil. It is an innovative additive that offers 50% more protection against wear than the typical industry standard. Also using the full synthetic formula, It can provide a good amount of protection in higher and lower environmental temperatures.

    The long-lasting anti-wear additives and added detergents effectively fight the deposits and sludge. It helps the engine to be more steady and less noisy during driving. Also, the improved antioxidants prevent the motor oil from a breakdown in severe conditions and weather.

    AS the additives stay in the oil longer, it will keep your engine operating at its full capacity. You can also use the Valvoline motor oil in both diesel and gasoline engines.

    Mobil 1 Advanced Full Synthetic Motor Oil

    Mobil 1 fully synthetic engine oil is another good consideration for your engine which has a viscosity of 5w-30. It protects your engine from wear, friction, heat, deposits, and sludge problems conveniently. It maintains a consistently good viscosity. Also, it protects the engine for mileage of 10000 miles before oil changes interval.

    It effectively maintains the oxidation to avoid oil breakdown. Additionally, it fulfills the ILSAC GF-6 standards, offers a low-speed pre-ignition (LSPI), and insulates the timing chain wear. It might help you to maintain your fuel economy better and also keep the engine tidy.

    Moreover, the Mobil 1 motor oil supports admirable heat insulation for the internal engine. It also provides support during the low temperature too.


    Who Makes STP Motor Oil?

    The STP synthetic motor oil is manufactured by the American brand known as STP which was taken from “Scientifically Treated Petroleum”. “Energizer Holdings'' is the owner of the brand. The company mainly deals with automotive products such as motor oil and motor oil additives.

    What Are the Benefits of STP Motor Oil?

    There are several benefits you can get using the STP motor oil. Some of them are:
    • It insulates the engine from wear, rust, and corrosion conveniently.
    • It can flow easily in both high and low temperatures.
    • It offers longer oil change intervals: 7500 to 10000 miles.

    Is STP Motor Oil Good for High Mileage?

    No. It is not suggested to use STP synthetic motor oil for high mileage engines. Because it flows easily, it is kind of slippery, and it restrains the wearing of parts inside the engine. However, it can easily go from 7000miles to 10000 miles, with occasionally 25000 miles. You can use it for high mileage engines if you wish, but it is not recommended.

    Is STP Motor Oil Good Motor Oil?

    Yes. It provides an improved and enhanced protection against wear and flows conveniently in all temperatures. It is also easy to use and doesn’t waste oil by spilling.

    Is the Price of this Synthetic Oil Worth it?

    Definitely. Typically, a synthetic oil change is costlier than conventional oil. However, it provides better protection than conventional oil and also lasts longer. It can be a bit more expensive than conventional oil, but it's not out of the affordable range. It costs more, but it will give higher profits in the long run.


    If you wish to have long-lasting motor oil at affordable prices, then STP Motor Oil might help you fulfill your needs. Also, the improved anti-wear properties provide long-lasting performance for your engine.

    STP Diesel Oil Treatment

    Product Tested

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    Best Parts, Inc.

    Company and Product Information

    Corporate Office:
    Best Parts, Inc.
    Memphis, TN, 38103


    Product: STP Pro Formula
    Viscosity Grade: SAE 15W-40
    Labeled: API CK-4/SN

    Manufactured for and Distributed by Best Parts, Inc., Memphis, TN

    Purchased at: Edison, NJ

    Date of purchase: 6/26/2018



    Test Results and Assessment:

    The results of the tests conducted on this sample meet the SAE J300 specifications for the SAE Viscosity Grade listed on the product label, and are consistent with the listed API Service Categories.


    bottle iconPhysical Propertiespass
    Elemental Analysispass

    Viscosity @ 100°C, cSt (ASTM D445)

    The results of the Kinematic Viscosity @ 100ºC test conducted on this sample meet the requirements of SAE J300.

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    Cold Cranking Viscosity, mPa s (cP) (ASTM D5293)

    The results of the Cold Cranking Viscosity test conducted on this sample meet the requirements of SAE J300.

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    Phosphorus, ppm (ASTM D5185)

    The results of the Phosporus test conducted on this sample meet the requirements of API CK-4/SN.

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    PHYSICAL TESTS (click for test details) StandardSTP
    TBN, mg KOH/g (ASTM D2896)10.08
    Viscosity @ 100ºC, cSt (ASTM D445)12.5 to <16.315.2
    Viscosity @40ºC, cSt (ASTM D445)114
    Viscosity Index (ASTM D2270)139
    Viscosity @-20ºC mPa s (cP) (ASTM D5293)7,000 Max6,484
    ELEMENTAL ANALYSIS (click for test details)
    Calcium, ppm1,047
    Magnesium, ppm965
    Phosphorus, ppm1,200 Max-c1,031
    Zinc, ppm1,134
    Molybdenum,  ppm59
    Barium, ppm<1
    Boron, ppm2
    Silicon, ppm4
    Potassium, ppm2
    Manganese, ppm<1
    Titanium, ppm<1
    Copper, ppm<1
    Sodium, ppm<1
    Vanadium, ppm<1
    Silver, ppm<1
    Aluminum, ppm<1
    Chromium, ppm<1
    Iron, ppm<1
    Nickel, ppm<1
    Lead, ppm<1
    Antimony, ppm<1
    Tin, ppm<1
    1. Standards, shown in yellow are established by API, SAE and others.
    2. Test Method for metal analysis is ASTM D5185.
    3. This specification is expressed to one significant figure, therefore results up to 1,249 are considered on specification.

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