General

  • What does STP stand for?

    • When STP started back in 1954, the founders called their product Scientifically Treated Petroleum. There have been many changes throughout the years and the STP® brand has stood the test of time. Now, STP® stands for Scientifically Treated Protection and has a range of products to help vehicles run better, and strong.

  • Is the STP® brand still involved with racing?

    • Yes, we still have a relationship with Petty Enterprises. The STP®/Richard Petty relationship was initiated in 1972 and is the longest running relationship of its kind in NASCAR history. Along with Armor All®, STP® co-sponsors the 4-Time World of Outlaws champion Donny Schatz.

  • Where can I get STP® stickers?

  • Where can I get STP® hats, shirts and other merchandise?

  • Are STP® products safe for my car?

    • Yes. All of the STP® products have been extensively tested and are safe for use in all cars. Always remember to follow the usage recommendations, which are clearly indicated on the label.

  • Will STP® work in Canada's colder winters?

    • Yes. STP® has been designed to work in the coldest temperatures, and can help your car's performance in any weather. 

  • Can I use STP® products in my new car?

    • Yes. STP® products can be used in any age vehicle and there are product formulations specific to high mileage vehicles.

  • Will STP® products void my warranty?

    • No. All STP® products undergo extensive testing to evaluate their performance and are determined to be safe for use in vehicles, both new and old. Our products are specifically formulated to help improve the performance of the gasoline or oil to which they are added and will, therefore, help maintain the performance of your car.

  • Are STP® products safe for four-cycle engines? How about two-cycle engines?

    • STP® oil and fuel additives have been specifically formulated for use in four-cycle gasoline engines. Extensive testing in these engines has covered a broad range of passenger car usage and has clearly demonstrated the value of our products in these applications. However, we have not evaluated the performance of our products in two-cycle engines. Therefore, we do not currently recommend that our fuel additives be used for two-cycle applications. Our Multipurpose Motor Treatment (MPMT) is designed for both 2 and 4 stroke engines and can be used in both the fuel and oil tanks. Click here to see details on our STP® MPMT product.

  • Are STP® products safe for diesel engine systems?

    • STP® has specially designed products for diesel engines and has labeled them as diesel products. They have been thoroughly tested and evaluated in specific diesel applications to demonstrate their ability to help improve specific performance attributes of those engines and fuels.

  • What's the shelf life? How long can I store it?

    • The storage life of STP® products is guaranteed for a minimum of five years from the date of manufacture. However, although our testing guarantees a minimum of five years' shelf life, our experience has indicated that if our products are stored properly, they can remain stable and retain their effectiveness for even longer than noted above.

  • How much do I use?

    • All STP® products are individually labeled for dose and treatment intervals.

  • Can I use STP® additives with other products?

    • STP® products are completely compatible with all other standard fuel and lubricant additives that are intended for similar use. However, mixing fuel or lubricant additives is neither recommended nor should it be necessary.

  • Can I use more than 'recommended'?

    • No. The products have been formulated to work best at the recommended treat-rate.