---
product_id: 650702802
title: "ATS Chemical 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: "517.54 DT"
currency: TND
in_stock: true
reviews_count: 5
category: "Ats Chemical"
url: https://www.desertcart.tn/products/650702802-ats-chemical-505-cro-oil-system-treatment-12-oz-engine
store_origin: TN
region: Tunisia
---

# Reduces engine noise & smooths idle Cleans sludge & carbon buildup 12 oz precision formula ATS Chemical 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:** 517.54 DT
**Availability:** ✅ In Stock

## Summary

> ⚡ Unlock your engine’s hidden potential — don’t let sludge slow you down!

## Quick Answers

- **What is this?** ATS Chemical 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?** 517.54 DT with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/650702802-ats-chemical-505-cro-oil-system-treatment-12-oz-engine)

## 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

- • **Quiet & Smooth Idle:** Experience whisper-quiet operation even in high-mileage engines
- • **Universal Compatibility:** Works seamlessly with gas & diesel engines across brands
- • **Deep-Cleans Engine Sludge:** Flush away harmful deposits for peak engine health
- • **Proven High-Mileage Savior:** Trusted by drivers to restore power and reduce emissions
- • **Boosts Lubrication Efficiency:** Minimizes friction to extend engine life and performance

## Overview

ATS Chemical 505 CRO Oil System Treatment is a 12 oz engine additive designed to clean sludge, improve lubrication, reduce emissions, and restore smooth, quiet performance in high-mileage gas and diesel engines. Compatible with most vehicles, it enhances engine longevity and efficiency by targeting sticking components and restricted oil flow.

## 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's worth the $55. I have a Toyota sedan that is 15 years new at 160,000 miles, as a maintenance action I treated the fuel tank with one bottle of 505 CRF Fuel treatment and while parked, ran the RPMs to 3,000 and held it there for 2 minutes to burn off carbon and clean the injectors. Within half a minute or so I could actually HEAR the car running to smoother. It reminded me of tuning an out of tune guitar string, the pitch/tone of the engine changed and the whole engine sounded smoother. 6 months later, the car still starts and runs like a dream. I can't promise you the same results, but I wanted to share my results with this product. As a sidenote...if you are reading this and have a car over 120,000 dont sleep on installing new spark plugs and install a new PCV valve. On some cars the install is relatively easy and the part is only $8 and now my car no longer burns oil! no more 1qt per month burned...

## Features

- 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 | #75,835 in Automotive ( See Top 100 in Automotive ) #303 in Oil & Fluid Additives |
| Brand | ATS Chemical |
| Customer Reviews | 4.6 4.6 out of 5 stars (294) |
| Date First Available | 30 March 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

![ATS Chemical 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)
![ATS Chemical 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)
![ATS Chemical 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)
![ATS Chemical 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)
![ATS Chemical 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)

## Customer Reviews

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

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

### ⭐⭐⭐⭐⭐ Review
*by P***L on 4 December 2025*

It's worth the $55. I have a Toyota sedan that is 15 years new at 160,000 miles, as a maintenance action I treated the fuel tank with one bottle of 505 CRF Fuel treatment and while parked, ran the RPMs to 3,000 and held it there for 2 minutes to burn off carbon and clean the injectors. Within half a minute or so I could actually HEAR the car running to smoother. It reminded me of tuning an out of tune guitar string, the pitch/tone of the engine changed and the whole engine sounded smoother. 6 months later, the car still starts and runs like a dream. I can't promise you the same results, but I wanted to share my results with this product. As a sidenote...if you are reading this and have a car over 120,000 dont sleep on installing new spark plugs and install a new PCV valve. On some cars the install is relatively easy and the part is only $8 and now my car no longer burns oil! no more 1qt per month burned...

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

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

## 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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*Product available on Desertcart Tunisia*
*Store origin: TN*
*Last updated: 2026-01-25*