STP Engine Oil Additive 15oz High Viscosity

Description

Product Overview

STP Oil Treatment 15 oz delivers a high‑viscosity formula (75W‑140 SAE) that enhances oil film strength and reduces metal‑to‑metal contact. Engineered for both conventional and synthetic oils, it contains ZDDP anti‑wear agents to protect critical engine components. The universal fit design makes it ideal for trucks, cars, light trucks and SUVs. Each bottle weighs 13.9 oz and measures 6.3 × 3.15 × 8.27 in, providing a convenient pour‑in solution for every oil change.

Usage

Add one 15 oz bottle to 4‑5 quarts of fresh oil during each oil change to maintain optimal lubrication and reduce oil burn. Ideal for daily commuters, fleet vehicles, and heavy‑duty trucks operating in demanding conditions. Consistent use helps maintain engine efficiency, lower emissions, and extend service intervals.

Why Choose Us

STP combines decades of automotive expertise with a proven high‑viscosity blend that outperforms standard additives. Our formula is tested for compatibility with a wide range of engine oils and meets rigorous industry standards. The product is backed by a strong customer rating of 4.7 stars from over a thousand reviews, reflecting reliability and satisfaction.

Key Features

• High‑viscosity 75W‑140 SAE grade for superior film strength
• Contains ZDDP anti‑wear agents to fight friction
• Reduces oil consumption and burning for longer oil life
• Compatible with both conventional and synthetic oils
• Easy 1‑bottle pour‑in use at every oil change

FAQ

Can I use STP Oil Treatment with synthetic oil?

Yes, the formula is engineered to work with both conventional and synthetic engine oils without affecting performance.

How often should I add the treatment?

For best results, add one 15 oz bottle to each oil change, typically every 5,000‑7,500 miles depending on your vehicle’s service schedule.

Will this additive improve fuel economy?

By reducing internal friction and oil consumption, the treatment can contribute to modest improvements in fuel efficiency.

Is STP Oil Treatment safe for high‑performance engines?

Yes, the high‑viscosity blend and ZDDP protection are suitable for high‑performance and heavy‑duty engines.

What is the shelf life of the product?

When stored in a cool, dry place, the bottle remains effective for up to three years from the date of manufacture.