CARE ABOUT YOUR CAR, TRUCK, OR WHATEVER YOU'RE DRIVING?

Then you've come to the right place. Find articles from the industry's experts on everything from better mileage to better performance. Whether you're getting your new ride ready to race or getting your old ride ready for winter, you'll find everything you need to know in one convenient place.

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FREQUENTLY ASKED QUESTIONS

  1. What is the difference between Regular Oil and Synthetic Oil?

    Synthetic motor oil flows easier and protects better than a conventional oil of the same grade. The chemical processes of creating a synthetic are very different than the simple refining techniques used to make conventional base oils.

    For conventional base oils the process is simply a separation and subtraction process. Once the base oil is separated, the subtraction process cleans and removes impurities and undesirable compounds, such as wax and sulfur.

    Synthetic processing uses select crude components that are chemically converted to create molecules that are different than the starting material. Synthetic processing rearranges, builds up and breaks apart molecules. This chemical processing produces synthetic base oils that are engineered to provide consistent and predictable superior performance over conventional base oil counterparts.

    Our synthetic oils are formulated to have small, flat molecules that lay on top of each other, which improves the flow of oil. Synthetic base oils are mixed with specialized additive systems that can be engineered to meet more demanding performance specifications that what is achievable from conventional motor oils. These specialized additives fight off sludge and deposit formations, and provide superior protection in extreme driving cycles. Using synthetic motor oil will also help keep your engine cleaner for longer periods of time.
  2. How is synthetic formulated compared to regular oil?

    Unfortunately, Castrol does not publish any of our formulations. Our additive systems and base oils are proprietary and chosen for performance and suitability first. Castrol uses only the highest quality materials, including synthetic base oils.

    Synthetic base fluid is manufactured chemically to possess superior viscosity characteristics at low temperatures, improved thermal and oxidative stability, and reduced volatility. Synthetic stock is created in a laboratory from small molecules which are reacted together to produce bigger “pure” molecules. As a result, the molecular structure of the lubricant can be precisely arranged to meet specific thermal or physical requirements and often exceed manufacturer's criteria for high performance engines.
  3. What is the difference between GTX and High Mileage?

    Castrol GTX High Mileage Helps Extend Engine Life
    As an engine gets older gaskets become brittle, seals deteriorate and oil burns faster. Castrol GTX High Mileage helps extend engine life. It provides superior oil burn off protection versus leading conventional oils and fights the main causes of engine failure: sludge, deposits and wear.

    GTX High Mileage provides complete protection:

    • Superior oil burn-off protection versus leading conventional oils*
    • Superior detergency that fights sludge build up
    • Seal conditioners to help reduce leaks
    • Advanced additives that minimize engine wear
  4. What does the manufacturer recommend for my vehicle?

    Castrol always recommends following the guidelines of the manufacturer for the recommended GRADE and API specific to your application. This information can be found in the vehicles owner's manual, by contacting the manufacturer directly, or by visiting the Castrol Grade Calculator at: http://www.castrol.com/castrol/LubesSelector.do?categoryId=82915691

    While a certain grade of oil may be suitable for one vehicle, it does not mean it is best for your vehicle. The GRADE of oil depends on the vehicles engine design, and the GRADE recommended by the vehicle manufacturer is the BEST for your specific vehicle.

    Also, by deviating from the grade recommended you could potentially void your manufacturer's warranty.
  5. Does Castrol make synthetic diesel oil?

    Castrol SYNTEC grades exceed all car and light truck manufacturer's warranty requirements for the protection of gasoline, diesel and turbocharged engines where API SL, SJ, SH, CF or CD is recommended.

    Please follow the guidelines of the manufacturer for the recommended GRADE and API specific to your application.
  6. What is the difference between SYNTEC and Castrol Edge?

    Edge is a completely different formula from SYNTEC that contains a different mix of base oils and additives. Edge meets the GM4718M specification and offers guaranteed protections for up to 15,000 miles, or one year, whichever comes first.* Finally, Edge provides unsurpassed engine wear protection that no leading synthetic oil, not even Mobil 1, can beat. This has been proven in industry tests conducted at an independent testing facility.**

    *Guarantee excludes severe service applications such as frequent towing and hauling, racing dirty conditions and extreme idling. If your vehicle is covered by a warranty, follow your car manufacturer's recommended oil change/service intervals, which can be found in your owner's manual.

    **Results based on Sequence IVA wear test.
  7. Why do I need to change my oil?

    Motor oil serves many purposes. Its primary function is to lubricate and protect, but it also keeps your engine cool and running clean. By changing your oil frequently, you remove by-products of combustion such as acid, soot, abrasives, water and unburned fuel. All of these substances can have damaging effects on both the performance and life of your engine.

    You should check your owners' manual for their recommended oil change service. However, we recommend for ultimate protection that you change your motor oil every 3,000 miles / 5,000 kms (or 3 months, whichever comes first).
  8. How do I know what oil to use?

    Castrol always recommends following the guidelines of the engine manufacturer for the recommended grade and API specific to your application. This information can be found in the vehicles owner's manual, by contacting the manufacturer directly, or using the Castrol Grade Calculator which can be reached by visiting the following link at:

    http://www.castrol.com/castrol/LubesSelector.do?categoryId=82915691
  9. What are the differences between the oil products (GTX, SYNTEC, Edge....)?

    Castrol GTX, with its unique shear stable viscosity improvers, exceeds demanding U.S. high shear and stay-in-grade requirements for viscosity breakdown protection. Rapid acceleration, sudden stops and highrevving all push your engine to work harder and run hotter. The extreme stress and searing heat generated from this hard driving can shear and volatilize oil, leading to viscosity and thermal breakdown.

    The highest North American standard of protection against viscosity breakdown. Advanced anti-wear additives to help extend engine life. Superior detergency action to help prevent deposits.

    Castrol GTX exceeds passenger car and light truck manufacturers' warranty requirements for the protection of gasoline and turbocharged engines where API SM, SL, SJ or SH is recommended. GTX grades are formulated to exceed the engine protection requirements of Ford ESE-M2C153-G and F, GM 6085M, Chrysler MS-6395M.

    SYNTEC provides superior protection against deposits. Corrosive particles such as acid, soot and oxidized fuel fragments can cause costly damage to critical engine parts. SYNTEC contains a Powerful Additive Package that neutralizes corrosive particles, preventing them from grouping together and forming sludge. Neutralizes acids in your engine that can cause rust and corrosion on vital engine parts such as cylinders, bearings and hydraulic valve lifters. SYNTEC meets the world's toughest gasoline engine protection requirements. SYNTEC provides Stability & Endurance under extreme conditions (heat, load, speed) that can cause conventional oils to break down. SYNTEC delivers the ultimate performance under high-temperature conditions: unsurpassed protection against volatility burn-off and viscosity increase. SYNTEC can be used with confidence in every gasoline engine passenger car, new or old, regardless of oil previously used. SYNTEC is fully compatible with all conventional and SYNTEC offers a level of protection that Outperforms All Leading Conventional Oils, passing severe industry torture tests.

    Edge is a completely different formula from SYNTEC that contains a different mix of base oils and additives. Edge meets the GM4718M specification and offers guaranteed protections for up to 15,000 miles, or one year, whichever comes first.* Finally, Edge provides unsurpassed engine wear protection that no leading synthetic oil, not even Mobil 1, can beat. This has been proven in industry tests conducted at an independent testing facility.**

    *Guarantee excludes severe service applications such as frequent towing and hauling, racing dirty conditions and extreme idling. If your vehicle is covered by a warranty, follow your car manufacturer's recommended oil change/service intervals, which can be found in your owner's manual.

    **Results based on Sequence IVA wear test.
  10. If I go to a synthetic do I have to stay with a synthetic oil?

    All of Castrol's oils are fully compatible with one another, and there is no cause for concern if you choose to switch from conventional to synthetic or vice versa. Because of this, it is not necessary to flush the engine. It is a common myth that you cannot go back to conventional motor oil after using synthetic.

    Even if you've switched to premium synthetic motor oil like Castrol Syntec, you can always go back to conventional oil, but why would you want to? Consider Castrol Syntec Full-Synthetic motor oil a "super lubricant," as it seeks out and neutralizes harmful particles in your engine, fights sludge on vital engine parts, neutralizes acids in your engine, and is fully compatible with conventional motor oil. For example, Castrol Syntec actually engulfs particles preventing them from grouping together and forming engine sludge. Synthetic motor oils deliver superior engine protection versus conventional oils, and once you try it, while you can go back, we doubt you'll want to.
  11. How do I decide when I need to change my car’s engine oil?

    In determining oil change intervals using SYNTEC, Castrol leans toward the conservative side and recommends following the engine manufacturers' guidelines found in your vehicle's manual for the specific type of driving you do.

    This is important because combustion byproducts and other contaminants are still going to build up in any type or brand of engine oil. A number of factors including the engine design, type of driving, weather conditions, oil filter used, etc. determine how much buildup is created. By changing your oil frequently, you remove by-products of combustion such as acid, soot, abrasives, water and unburned fuel. All of these substances can have damaging effects on both the performance and life of your engine.

    Manufacturers recommended service intervals today cite maintenance schedules based on ‘Normal Driving Conditions'. If you short trip the vehicle, drive in traffic, travel at speeds over 60 mph then you are in all likelihood running a ‘Severe Driving Condition' interval. If you read the fine print on many of the oil life monitors and how they work they point out that in the event of battery disconnect or power loss revert to a 3 month/3,000 mile oil change interval. Why? Because it establishes a base point and it is the safest interval for maximum engine protection and longevity.

    We have tested our oil under considerably higher oil change intervals and it has performed very well however with the number of unknowns as mentioned above, and erring on the side of caution we reiterate that the manufacturers' recommendation should be followed.
  12. Will my car leak oil if I go to a synthetic?

    Synthetic motor oil will not cause leaks. Castrol Syntec Full-Synthetic motor oil a "super lubricant," as it seeks out and neutralizes harmful particles in your engine, fights sludge on vital engine parts, neutralizes acids in your engine. Castrol Syntec actually engulfs particles preventing them from grouping together and forming engine sludge. Synthetic motor oils deliver superior engine protection.
  13. What do the viscosity ratings mean?

    When we manufacture a multi-grade oil, like a 5W-30, viscosity modifiers (additives) are added to the oil that help the oil to resist it's natural tendencies to thin and thicken at high and low temperatures.

    For example, oil naturally gets thicker at low temperatures, so the viscosity modifiers added to the oil cause the oil to thin out more than it normally would at low temperatures. (like adding water to molasses)

    For high temperatures oil wants to thin, so different viscosity modifiers that are put in the oil cause the oil thicken when the oil gets hot (like putting cornstarch in gravy)

    Therefore, the oil is able to be thinner at low temperatures (5W) and thicker at high temperatures (30W) than normally possible.
FREQUENTLY ASKED QUESTIONSX
 

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