faqs | STP.com
Is STP® still involved with racing?

Yes, we still have a relationship with Richard Petty Motorsports, the longest affiliation of its kind in NASCAR® history.  Follow us on Twitter: @OriginalSTP

Where can I find promotional offers on STP® products?

Promotional offers on STP® products can be found on our Facebook page. Don’t forget to check frequently at major retailers, as they also offer promotions on STP® products.

Are you offering sponsorships of any kind for social clubs, sports/racing teams or events?

At this time we are not taking on any new sponsorships.

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

Buy them now.

Are STP® products safe to use through a vacuum line?

We do not advise putting STP® products through a vacuum line.

Can I use more than is “recommended”?

No. The products have been formulated to work best at the recommended treatment rate.

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 not recommended, nor should it be necessary.

How much do I use?

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

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

Different products have a different shelf life.

View Shelf Life Guide

Are STP® products safe for diesel engine systems?

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.

Are STP® products safe for two-cycle engines? Four-cycle engines?

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.

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.

Can I use STP® products in my new car?

Yes. STP® products can be used in vehicles of any age.

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.

What does “STP®” stand for?

“STP®” stands for Scientifically Treated Petroleum. Back in 1954, our only product was STP® Oil Treatment.