---
product_id: 5838924
title: "High Viscosity Oil Treatment (15 fluid ounces)"
brand: "stp"
price: "€ 14.34"
currency: EUR
in_stock: true
reviews_count: 13
category: "Stp"
url: https://www.desertcart.it/products/5838924-high-viscosity-oil-treatment-15-fluid-ounces
store_origin: IT
region: Italy
---

# Universal fit for cars, trucks & SUVs ZDDP anti-wear agent High viscosity 50 weight High Viscosity Oil Treatment (15 fluid ounces)

**Brand:** stp
**Price:** € 14.34
**Availability:** ✅ In Stock

## Summary

> 🛠️ Keep your engine running like new — don’t let friction steal your ride!

## Quick Answers

- **What is this?** High Viscosity Oil Treatment (15 fluid ounces) by stp
- **How much does it cost?** € 14.34 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.it](https://www.desertcart.it/products/5838924-high-viscosity-oil-treatment-15-fluid-ounces)

## Best For

- stp enthusiasts

## Why This Product

- Trusted stp brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Oil Saver Boost:** Helps reduce oil consumption, keeping your engine running smoother longer
- • **Thicker Oil Cushion:** High viscosity formula creates a protective barrier for moving parts
- • **Versatile Engine Armor:** Compatible with both conventional and synthetic oils across vehicle types
- • **Ultimate Friction Fighter:** ZDDP zinc additive reduces metal-to-metal wear for engine longevity
- • **Routine Maintenance Essential:** Add every oil change to maintain peak engine performance and reliability

## Overview

STP High Viscosity Oil Treatment is a 15 fl oz engine additive featuring zinc-based ZDDP to combat metal friction and wear. Designed for use with conventional or synthetic oils, its thick 50-weight formula lubricates moving parts, reduces oil consumption, and fits all cars, light trucks, and SUVs. Ideal for routine oil changes, it extends engine life and maintains performance.

## Description

STP Oil Treatment fights friction to help protect against engine wear. This high-viscosity formula, complete with anti-wear agent ZDDP (Zinc Dialkyl Dithiophosphate), is specifically formulated to help fight metal-to-metal friction and helps reduce oil consumption. Lubricates moving engine parts by providing a thicker cushion between moving engine parts. Scientifically engineered for Conventional or Synthetic oils. This high viscosity formula can be used for all cars, light trucks and SUVs. Have you noticed a drop in performance lately? The moving parts in your engine operate under very tight tolerances. As mileage increases, excessive wear and friction can occur. This metal-to-metal condition could hurt your engine's reliability and overall performance. Guard against excessive friction with STP Oil Treatment. Add this car care treatment product to the engine oil during every oil change as part of routine car maintenance.

Review: STP old school oil. - Good price, just what i was looking for 50 weight oil. Just like i used back in the day. And it is as described. 5 stars for its description and performance. Good stuff!
Review: It does what i wanted it for. - I bought this stuff as a lube for the splines in my lathe and drill press. Very thick and sticky, which is what I wanted.

## Features

- Contains zinc anti-wear agent ZDDP that fights metal-to-metal friction
- Reduces oil consumption
- Lubricates moving engine parts by providing a thicker cushion between moving engine parts
- Scientifically engineered for Conventional or Synthetic Oils
- High viscosity formula is compatible with cars, light trucks and SUVs for versatile use
- Add this STP Oil Treatment to the engine oil during every oil change as part of routine car maintenance

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0009PCPP4 |
| Automotive Fit Type | Universal Fit |
| Best Sellers Rank | #44,886 in Automotive ( See Top 100 in Automotive ) #72 in Engine & Oil Fluid Additives #384 in Motor Oils |
| Brand | STP |
| Customer Reviews | 4.7 4.7 out of 5 stars (1,053) |
| Date First Available | June 15, 2006 |
| Global Trade Identification Number | 00071153651487 |
| Is Discontinued By Manufacturer | Yes |
| Item Weight | 13.9 ounces |
| Item model number | 65148 |
| Manufacturer | STP |
| Manufacturer Part Number | 65148 |
| Model | STP 65148 15 Oz Oil Treatment |
| Product Dimensions | 6.3 x 3.15 x 8.27 inches |
| SAE J300 Viscosity Grade | 50 |
| Size | 15 Fl Oz (Pack of 1) |
| Special Features | Moisturizing |
| UPC | 071153651487 |
| Vehicle Service Type | compatible_with_vehicle_type |
| Viscosity | 75w_140 sae_grade |

## Product Details

- **Brand:** STP
- **Liquid Volume:** 443 Milliliters
- **Package Information:** Can
- **Vehicle Service Type:** compatible_with_vehicle_type
- **Viscosity:** 75w_140 sae_grade

## Images

![High Viscosity Oil Treatment (15 fluid ounces) - Image 1](https://m.media-amazon.com/images/I/81mybm036AL.jpg)

## Questions & Answers

**Q: Whats the differnce from this blue bottle and the high mileage one?**
A: The high mileage version contains stop leak and seems a bit thinner. I did not have good results with the high mileage version, but the standard on is great. The high mileage label also claims it cleans your engine, which seems like nonsense; it just made part of my engine oil turn into a gel. I recommend the standard version.

**Q: Can it be used with synthetic oil?**
A: I have a classic muscle car and use conventional oil and need the extra ZZDP. Not sure about synthetic oil, but my guess is not.

**Q: can you use this on modern cars? jeep 2006 burns oil - about 1 qt every 3 months**
A: This particular product has ZDDP and is not recommended for vehicles with catalytic converters. I would recommend the STP 17881 for synthetic motor oil.

**Q: Can I use this in my differential?**
A: Use only differential gear oils recommended by your owners manual.

## Customer Reviews

### ⭐⭐⭐⭐⭐ STP old school oil.
*by T***D on February 25, 2025*

Good price, just what i was looking for 50 weight oil. Just like i used back in the day. And it is as described. 5 stars for its description and performance. Good stuff!

### ⭐⭐⭐⭐⭐ It does what i wanted it for.
*by S***E on December 9, 2025*

I bought this stuff as a lube for the splines in my lathe and drill press. Very thick and sticky, which is what I wanted.

### ⭐⭐⭐⭐⭐ thanks
*by J***R on January 10, 2026*

good

## Frequently Bought Together

- STP 65148 Oil Treatment - 15 fl. oz.
- Valvoline High Mileage with MaxLife Technology SAE 5W-30 Synthetic Blend Motor Oil 5 QT
- STP High Mileage Oil Treatment + Stop Leak - 15 FL OZ

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*Product available on Desertcart Italy*
*Store origin: IT*
*Last updated: 2026-01-26*