---
product_id: 218633336
title: "Schaeffer Manufacturing Co. 9000CK4-006S SynShield OTR Plus Full Synthetic Diesel Engine Oil 5W-40, 1-Gallon Bottle"
brand: "schaeffer's"
price: "686.69 DT"
currency: TND
in_stock: true
reviews_count: 8
category: "Schaeffer's"
url: https://www.desertcart.tn/products/218633336-schaeffer-manufacturing-co-9000ck4-006s-synshield-otr-plus-full-synthetic
store_origin: TN
region: Tunisia
---

# Fuel economy boost High heat resistance Superior cold start Schaeffer Manufacturing Co. 9000CK4-006S SynShield OTR Plus Full Synthetic Diesel Engine Oil 5W-40, 1-Gallon Bottle

**Brand:** schaeffer's
**Price:** 686.69 DT
**Availability:** ✅ In Stock

## Summary

> 🚛 Power your diesel with the ultimate synthetic shield — don’t let your engine settle for less!

## Quick Answers

- **What is this?** Schaeffer Manufacturing Co. 9000CK4-006S SynShield OTR Plus Full Synthetic Diesel Engine Oil 5W-40, 1-Gallon Bottle by schaeffer's
- **How much does it cost?** 686.69 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/218633336-schaeffer-manufacturing-co-9000ck4-006s-synshield-otr-plus-full-synthetic)

## Best For

- schaeffer's enthusiasts

## Why This Product

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

## Key Features

- • **Cold Start Champion:** Ensures smooth ignition and operation even in the harshest winter conditions.
- • **Soot & Deposit Slayer:** Advanced soot-busting and deposit-dispersing technology keeps engines cleaner, longer.
- • **Emission System Friendly:** Perfectly compatible with 2007+ emission systems including DPF, DOC, and SCR devices.
- • **Engine Armor Against Heat:** Withstands higher temperatures than conventional oils for relentless performance.
- • **Fuel Efficiency Maximizer:** Optimized formula maintains fuel economy without compromising engine durability.

## Overview

Schaeffer Manufacturing’s SynShield OTR Plus 5W-40 is a full synthetic diesel engine oil engineered for heavy-duty, low-emission diesel engines. It delivers superior protection against wear, oxidation, soot, and deposits while enhancing fuel economy and cold weather startability. Compatible with modern emission control systems, this 1-gallon premium oil is designed to extend engine life and maintain peak performance under extreme conditions.

## Description

Schaeffers SynShield OTR Plus 5W40 Full Synthetic Oil is a premium advanced performance, synthetic plus, heavy-duty diesel engine oil formulated to provide maximum protection against wear, oxidation, deposit formation, soot contamination and aeration. SynShield OTR Plus 5W40 Full Synthetic provides excellent fuel economy while maintaining engine durability and longevity. Using our proprietary friction modifiers, Micron Moly and Penetro, SynShield OTR Plus 5W40 Full Synthetic creates a slippery, tenacious shield that prevents metal-to-metal contact for increased engine efficiency. SynShield OTR Plus 5W40 Full Synthetic is suitable for use in 2007 and 2010 emission complaint engines that utilize heavy exhaust gas recirculation (EGR) and exhaust after-treatment devices such as diesel particulate filters (DPFs) with or without diesel oxidation catalysts (DOCs) and selective catalytic reduction (SCR). Schaeffer’s 5W40 is suitable for use API CK-4 specifications.

Review: PLEASE READ THIS! - A friend inherited an ‘05 6.0 PSD and had no idea what maintenance had or had not been performed on it — a respected independent diesel shop later told us that the truck had not been well maintained. I started the engine and noticed it took a few more revolutions to get the engine to fire. I checked the oil and it was as black as the tires. Not knowing anything about the 6.0, I bought a non Motorcraft oil filter and a non synthetic 15W40 diesel oil. The engine continued taking more revolutions than I thought was normal to get it started. I read up on the 6.0 PSD and found that I definitely purchased the wrong filter and likely the wrong oil. I purchased a Motorcraft filter AND CAP, Schaeffer’s 5W40 full synthetic and Archoil Friction Modifier. Approximately 100 miles into the second oil change the 6.0 started in one half the time that it took with the other products. I’m still sold on changing the oil and filter every three thousand miles. Three thousand miles later, I was pleasantly surprised at how clean the used oil was. On the 6.0 PSD I would suggest Schaeffer’s 5W40, a Motorcraft filter AND CAP along with the Archoil Friction Modifier. I would also suggest using the Archoil diesel fuel additive. I know that this stuff is expensive, but it makes her 6.0 happy! This regimen, a thorough servicing and detail has turned this into a nice truck.
Review: The only oil I'll put in my diesel - Best oil ever made

## Features

- Maintains Fuel Economy Without Sacrificing Engine Durability.
- Superior Cold Weather Startability And Operating Characteristics.
- Oil Strength: Withstands Higher Heat Range Than Conventional Oils.
- Keep-Clean Performance: Superior Soot Busting, Deposit-Dispersing Capability.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B08BW72P1H |
| Automotive Fit Type | Universal Fit |
| Best Sellers Rank | #15,367 in Automotive ( See Top 100 in Automotive ) #183 in Motor Oils |
| Brand | Schaeffer's |
| Date First Available | June 25, 2020 |
| Item Weight | 7.52 pounds |
| Item model number | 9000CK4-006S |
| Manufacturer | Schaeffer Manufacturing Co. |
| Package Dimensions | 10.91 x 7.8 x 4.53 inches |
| SAE J300 Viscosity Grade | 5W-40 |
| Size | 1 Gallon |
| UPC | 744954027651 |
| Vehicle Service Type | Diesel Engines, Low-Emission Certified Vehicles, Older Models, Off-Highway Diesel Engines |
| Viscosity | 5w-40 |

## Product Details

- **Brand:** Schaeffer's
- **Liquid Volume:** 128 Fluid Ounces
- **Package Information:** Bottle
- **Vehicle Service Type:** Diesel Engines, Low-Emission Certified Vehicles, Older Models, Off-Highway Diesel Engines
- **Viscosity:** 5w-40

## Images

![Schaeffer Manufacturing Co. 9000CK4-006S SynShield OTR Plus Full Synthetic Diesel Engine Oil 5W-40, 1-Gallon Bottle - Image 1](https://m.media-amazon.com/images/I/81FW4zfmzFL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ PLEASE READ THIS!
*by J***N on December 28, 2025*

A friend inherited an ‘05 6.0 PSD and had no idea what maintenance had or had not been performed on it — a respected independent diesel shop later told us that the truck had not been well maintained. I started the engine and noticed it took a few more revolutions to get the engine to fire. I checked the oil and it was as black as the tires. Not knowing anything about the 6.0, I bought a non Motorcraft oil filter and a non synthetic 15W40 diesel oil. The engine continued taking more revolutions than I thought was normal to get it started. I read up on the 6.0 PSD and found that I definitely purchased the wrong filter and likely the wrong oil. I purchased a Motorcraft filter AND CAP, Schaeffer’s 5W40 full synthetic and Archoil Friction Modifier. Approximately 100 miles into the second oil change the 6.0 started in one half the time that it took with the other products. I’m still sold on changing the oil and filter every three thousand miles. Three thousand miles later, I was pleasantly surprised at how clean the used oil was. On the 6.0 PSD I would suggest Schaeffer’s 5W40, a Motorcraft filter AND CAP along with the Archoil Friction Modifier. I would also suggest using the Archoil diesel fuel additive. I know that this stuff is expensive, but it makes her 6.0 happy! This regimen, a thorough servicing and detail has turned this into a nice truck.

### ⭐⭐⭐⭐⭐ The only oil I'll put in my diesel
*by B***R on December 13, 2025*

Best oil ever made

### ⭐⭐⭐⭐⭐ In a league of its own.
*by D***A on August 2, 2025*

Truly in a league of its own. I did a ton of research before choosing this oil for the first oil change in my 6.7 Cummins. I've got to say that I am beyond thrilled with the results. I could immediately tell a dramatic improvement in the engine power, acceleration and responsiveness. I also noticed the engine noise is quieter now and there's no noticeable ticking noises either. The increased performance truly makes the truck even more fun to drive!

## Frequently Bought Together

- Schaeffer Manufacturing Co. 9000CK4-006S SynShield OTR Plus Full Synthetic Diesel Engine Oil 5W-40, 1-Gallon Bottle
- Motorcraft Oil Filter - FL2124S (Replaces FL2051S)
- Schaeffer Manufacturing Co. 9000CK4-012S SynShield OTR Plus Full Synthetic Diesel Engine Oil 5W-40, 1-Quart Bottle

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*Product available on Desertcart Tunisia*
*Store origin: TN*
*Last updated: 2026-02-09*