---
product_id: 715315506
title: "505 CRO Oil System Treatment - 12 oz Engine Oil Additive - Cleans Sludge, Reduces Emissions, Quiet Smooth Idle & Restores Performance in High-Mileage Gas & Diesel Engines"
brand: "ats chemical"
price: "€ 56.39"
currency: EUR
in_stock: false
reviews_count: 5
url: https://www.desertcart.gr/products/715315506-505-cro-oil-system-treatment-12-oz-engine-oil-additive
store_origin: GR
region: Greece
---

# Reduces emissions effectively Restores high-mileage engine performance 12 oz precision dosing 505 CRO Oil System Treatment - 12 oz Engine Oil Additive - Cleans Sludge, Reduces Emissions, Quiet Smooth Idle & Restores Performance in High-Mileage Gas & Diesel Engines

**Brand:** ats chemical
**Price:** € 56.39
**Availability:** ❌ Out of Stock

## Summary

> ⚡ Unlock your engine’s hidden potential — clean, quiet, and powerful!

## Quick Answers

- **What is this?** 505 CRO Oil System Treatment - 12 oz Engine Oil Additive - Cleans Sludge, Reduces Emissions, Quiet Smooth Idle & Restores Performance in High-Mileage Gas & Diesel Engines by ats chemical
- **How much does it cost?** € 56.39 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.gr](https://www.desertcart.gr/products/715315506-505-cro-oil-system-treatment-12-oz-engine-oil-additive)

## Best For

- ats chemical enthusiasts

## Why This Product

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

## Key Features

- • **Cuts Harmful Emissions:** Eco-conscious formula reduces your carbon footprint
- • **Deep-Cleans Engine Sludge:** Eradicates sticky deposits for a pristine oil system
- • **Revives High-Mileage Engines:** Restores power and responsiveness in older gas & diesel vehicles
- • **Boosts Lubrication Efficiency:** Minimizes friction to extend engine life and smooth idle
- • **Easy Add-On During Oil Change:** Seamlessly integrates into your maintenance routine

## Overview

The 505 CRO Oil System Treatment is a 12 oz engine additive designed to clean sludge, improve lubrication, reduce emissions, and restore performance in high-mileage gas and diesel engines. Trusted by professionals and rated 4.7 stars, it seamlessly integrates into oil changes to keep your engine running smoother, quieter, and longer.

## Description

The 505 CRO Oil System Treatment (12 FL OZ) is an automotive product designed to improve the performance and longevity of your vehicle's engine by enhancing its oil system. This treatment typically works to: Clean and Protect: Helps remove sludge, varnish, and other deposits that can accumulate in the oil system, keeping it clean. Lubrication Improvement: Enhances the oil's ability to lubricate moving parts, reducing friction and wear. Performance Optimization: Improves overall engine performance by ensuring smoother operation. Compatibility: Usually safe for use with various types of engine oils and vehicles, though specifics should be checked on the product label. How to Use: Read the Label: Always follow the manufacturer's instructions provided on the product. Warm Up the Engine: Run the engine to bring it to normal operating temperature. Add Treatment: Pour the treatment directly into the oil system, either during an oil change or as specified by the product. Drive Normally: Let the product circulate through the engine to clean and enhance the system.

Review: It does 100 percent as it says it will, few products do.
Review: It improves the engine life, and clean all residue of sticky oil and dirt.

## Features

- Causes skin irritation.
- Flammable liquid and vapour.
- May be fatal if swallowed and enters airways.
- May cause an allergic skin reaction.
- Sticking piston rings
- Sticking lifters
- Sticking camshaft phasers
- Sticking oil control valve
- Sticking timing chain tensioner
- Restricted lubricating screens

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0CYXTJ8P6 |
| Best Sellers Rank | 345,574 in Automotive ( See Top 100 in Automotive ) 245 in Engine Oil Additives |
| Brand | ATS CHEMICAL |
| Customer Reviews | 4.7 4.7 out of 5 stars (232) |
| Date First Available | 10 Dec. 2024 |
| Item Weight | 318 g |
| Item model number | DSI1040 |
| Manufacturer | ATS Chemical |
| Manufacturer part number | 1040 |
| Model | 505CRO |
| Product Dimensions | 15.24 x 5.59 x 5.59 cm; 317.51 g |

## Images

![505 CRO Oil System Treatment - 12 oz Engine Oil Additive - Cleans Sludge, Reduces Emissions, Quiet Smooth Idle & Restores Performance in High-Mileage Gas & Diesel Engines - Image 1](https://m.media-amazon.com/images/I/718XLEUIE8L.jpg)
![505 CRO Oil System Treatment - 12 oz Engine Oil Additive - Cleans Sludge, Reduces Emissions, Quiet Smooth Idle & Restores Performance in High-Mileage Gas & Diesel Engines - Image 2](https://m.media-amazon.com/images/I/71PbpIgd82L.jpg)
![505 CRO Oil System Treatment - 12 oz Engine Oil Additive - Cleans Sludge, Reduces Emissions, Quiet Smooth Idle & Restores Performance in High-Mileage Gas & Diesel Engines - Image 3](https://m.media-amazon.com/images/I/71R-u+y9WoL.jpg)
![505 CRO Oil System Treatment - 12 oz Engine Oil Additive - Cleans Sludge, Reduces Emissions, Quiet Smooth Idle & Restores Performance in High-Mileage Gas & Diesel Engines - Image 4](https://m.media-amazon.com/images/I/71TFSAV6BPL.jpg)
![505 CRO Oil System Treatment - 12 oz Engine Oil Additive - Cleans Sludge, Reduces Emissions, Quiet Smooth Idle & Restores Performance in High-Mileage Gas & Diesel Engines - Image 5](https://m.media-amazon.com/images/I/71iFI2CfKNL.jpg)

## Available Options

This product comes in different **Part Number, Model, Style** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by A***R on 25 November 2024*

It does 100 percent as it says it will, few products do.

### ⭐⭐⭐⭐⭐ Review
*by O***O on 25 October 2024*

It improves the engine life, and clean all residue of sticky oil and dirt.

### ⭐ Review
*by J***E on 29 August 2025*

Disappointed as I followed the directions to the letter and for this price, I was expecting more than crickets. I guess it's for individuals that don't do regular oil changes because I wasted 20 mins of fuel in a 5.7 liter v8 for the oil to smell different upon changing, that's all.

## Frequently Bought Together

- ATS Chemical 505 CRO Oil System Treatment (505 CRO Oil System Treatment 12 FL OZ)
- ATS Chemical 505 CRF Fuel System Treatment, 16 fluid ounces
- ATP Automotive AT-205 Re-Seal Stops Leaks, 8 Ounce Bottle

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**Shop now:** [https://www.desertcart.gr/products/715315506-505-cro-oil-system-treatment-12-oz-engine-oil-additive](https://www.desertcart.gr/products/715315506-505-cro-oil-system-treatment-12-oz-engine-oil-additive)

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*Product available on Desertcart Greece*
*Store origin: GR*
*Last updated: 2026-02-28*