R
Riley N.Verified Buyer
06/08/2025
No complaints
Quick delivery and the product exceeded my expectations.
STPSynthetic Automotive Oil Treatment - 15 fl. oz. Bottle
$10.49
Delivery by Oct 18
- Free shipping over $25
- Next-business-day ship
- Easy returns
Guides & Resources
Product guides for this item are not available online yet. Contact us if you need documentation.
Shipping Information
Free shipping on orders over $25. Most items ship next business day after your order is placed.
Returns Policy
Returns are accepted when the product is in its original, unopened container. Contact us if you have questions about your order.
Product facts
About This Item
- One 15 fl oz bottle of STP Synthetic Oil Treatment
- Formulated especially for low-viscosity oils with extra protection for extended oil drain intervals
- Detergents in STP Oil Treatment help to keep the engine clean and prevent deposits
- Enhances oil durability to prevent breaking down synthetic oil
- Helps protect against engine wear
- Add to your synthetic oil during each routine oil change
- Uses a high-quality synthetic base oil so it doesn't dilute your motor oil
Details
Product Description
STP Synthetic Oil Treatment provides extra protection for extended oil drain intervals that come with synthetic oil use. Re-formulated for use with low-viscosity oils, this engine treatment offers the same benefits as traditional STP Oil Treatment. ZDDP oil additive helps to protect against engine wear to keep your car running efficiently. These engine oil additives use detergents to prevent engine deposits so your engine runs clean, and antioxidants help to enhance oil durability by reducing oil breakdown and preventing oil burning. Add this treatment during every oil change to protect your engine without diluting your motor oil.
Brand
Brand Story
Since 1954
Oil filters
STP
An oil-additive brand from St. Joseph, Missouri
STP introduced its first oil treatment in 1954 in St. Joseph, Missouri. The name stands for Scientifically Treated Petroleum. The lineup includes oil and fuel additives plus oil and air filters, with selected STP products sold at District Mailing Auto.
Shop STPHeritage
1954
The first STP oil treatment was introduced in St. Joseph, Missouri, in 1954.
Lineup
Additives and filters
The brand covers oil additives, fuel additives, oil filters, and air filters.
Storefront
At District Mailing Auto
Shop the STP products currently in the catalog.
Customer Reviews
4.7
Based on 7 reviews
M
Maria K.Verified Buyer
08/17/2025
Would buy again
Does what it is supposed to do. Happy with this purchase.
T
Ted R.Verified Buyer
02/03/2025
Works perfectly
Setup was simple and it has worked reliably since day one.
P
Pat M.Verified Buyer
11/28/2025
Better than expected
Reliable product and smooth buying experience on this site.
C
Chris W.Verified Buyer
07/05/2025
Highly recommend
Good experience overall from checkout to delivery.
J
Jordan L.Verified Buyer
04/15/2025
Very happy with this
Packaging was secure and the item was in perfect condition.
E
Emma S.Verified Buyer
12/14/2025
Exactly what I needed
Easy to order and arrived quickly. Product matched the listing and works great.