“STP®” stands for Scientifically Treated Petroleum. Back in 1954, our only product was STP® Oil Treatment.
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.
Yes. STP® products can be used in vehicles of any age.
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.
STP® oil and fuel additives have been specifically formulated for use in four-cycle gasoline engines. Extensive testing in these engines has encompassed a broad range of passenger car usage and 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 they be used for two-cycle applications.
STP® has specially designed products for diesel engines, which have been labeled 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 diesel engines and fuels.
The storage life of STP® products is guaranteed for a minimum of two years. However, although our testing guarantees a minimum of two year’s shelf life, our experience has indicated that if our products are stored properly, they can remain stable and retain their effectiveness for an indefinite period of time.
All STP® products are individually labeled for dose and treatment intervals.
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 not recommended, nor should it be necessary.
No. The products have been formulated to work best at the recommended treatment rate.
We do not advise putting STP® products through a vacuum line.
At this time we are not taking on any new sponsorships.
© 2019 The Armor All/STP Products Company, a Spectrum Brands Company