---
product_id: 92087184
title: "Fleet Ultra 15W-40 CK-4 API Licensed Synthetic Blend, Moly and Boron Performance Boosted, Heavy Duty Diesel Engine Oil, OEM Compatible with Volvo, Mack, Cummins, DD (5 Gallon)"
brand: "triax"
price: "AR$879388"
currency: ARS
in_stock: true
reviews_count: 8
category: "Triax"
url: https://www.desertcart.com.ar/products/92087184-fleet-ultra-15w-40-ck-4-api-licensed-synthetic-blend
store_origin: AR
region: Argentina
---

# Drain intervals up to 65,000 miles for max uptime Moly & Boron boost for superior heat & wear management 15W-40 viscosity for optimal engine protection Fleet Ultra 15W-40 CK-4 API Licensed Synthetic Blend, Moly and Boron Performance Boosted, Heavy Duty Diesel Engine Oil, OEM Compatible with Volvo, Mack, Cummins, DD (5 Gallon)

**Brand:** triax
**Price:** AR$879388
**Availability:** ✅ In Stock

## Summary

> 🚛 Power your fleet with the ultimate heavy-duty oil upgrade!

## Quick Answers

- **What is this?** Fleet Ultra 15W-40 CK-4 API Licensed Synthetic Blend, Moly and Boron Performance Boosted, Heavy Duty Diesel Engine Oil, OEM Compatible with Volvo, Mack, Cummins, DD (5 Gallon) by triax
- **How much does it cost?** AR$879388 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.ar](https://www.desertcart.com.ar/products/92087184-fleet-ultra-15w-40-ck-4-api-licensed-synthetic-blend)

## Best For

- triax enthusiasts

## Why This Product

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

## Key Features

- • **Quieter, Smoother Rides:** Reduces engine noise and stiction for a premium driving experience that your truck—and ears—will thank you for.
- • **Extended Drain Intervals:** Go further with drain capabilities exceeding 12,000 miles for farm trucks and up to 65,000 miles for highway haulers.
- • **Unmatched Engine Longevity:** Advanced molybdenum and boron additives slash wear and friction, extending your diesel’s life.
- • **Universal OEM Compatibility:** Backwards compatible with all major heavy-duty diesel engines—Volvo, Mack, Cummins, DD—no compromises.
- • **Next-Level Clean Performance:** State-of-the-art ash control and dispersal keep your engine spotless, preventing costly injector and piston issues.

## Overview

TRIAX Fleet Ultra 15W-40 CK-4 is a synthetic blend diesel engine oil enhanced with molybdenum and boron for superior wear reduction, heat management, and friction control. Licensed to meet the latest API CK-4 standards, it offers exceptional engine cleanliness and extended drain intervals up to 65,000 miles. Compatible with all major heavy-duty diesel engines, this oil ensures quieter operation and longer engine life, making it the go-to choice for professional fleets and serious truck owners.

## Description

Buy TRIAX Fleet Ultra 15W-40 CK-4 API Licensed Synthetic Blend, Moly and Boron Performance Boosted, Heavy Duty Diesel Engine Oil, OEM Compatible with Volvo, Mack, Cummins, DD (5 Gallon): Motor Oils - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: My go to oil - Absolutely love this oil for my 99 Ford F250 Super Duty 7.3. I decided to try this about a year ago and it does a great job. I also use the Archoil additive and have never had any leakage issues and my temperatures are great. My injectors seem quieter with this oil than with regular oil and it does a great job keeping everything clean. When I removed my valve covers I didn’t have any grime or anything on the inside of the covers or in any spots on the heads. For the price of this oil I used to get about 4 gallons so it’s a great value for the money…plus you get another bucket to use around the shop or house when you clean all the oils out.
Review: IT REALLY DOES WORK. - Changed to this oil in my 2000 f250 7.3 w 314k miles on it [only 17 miles ago] and it already starts faster cold and seems quieter as well. hoping for better mileage and longer engine life. driving 300 miles tomorrow so I will let you know more after that. ……………..So...., 309 miles. 17.4mpg. was only getting around 15.5 before, tried to keep my speed below 65 and let the engine torque do all the work. engine noise is down too. ...Im very happy with this oil. 1/18/2019 update... continues to start faster than before, runs better, quieter and making me happy. no more rotella or delo for me! update 2/26/22 Still using this oil, best 7.3 oil I've ever used. Update 6/8/22 Still love this oil, used on a friends 2002 f350 7.3, he said his truck was never this quiet. I change my oil at 7500 miles due to it only being used for towing and short trips in town, would definitely keep it in over 10k if lots of hiway use. 11/29/2024, still buying this oil, love it. wish s7 was still available.

## Features

- Contains built-in performance boosters for friction reduction, oxidation inhibition, shear, and viscosity stability
- Nano borate and organic molybdenum reinforced for outstanding wear reduction and heat management; eliminates stiction and injector issues; frees most stuck piston rings; contains state-of-the-art dispersal and ash control systems to keep your engine extremely clean
- API licensed synthetic blend product for the latest API CK-4 New CK-4 spec
- This product is backwards compatible with virtually all heavy-duty diesel engines from all years on both US, Japanese and European heavy-duty trucks and equipment including previous CJ-4, CI-4, and CI-4 Plus specifications
- Drain capabilities exceed 12,000 miles for farm trucks, 65,0000 miles for class 8 highway trucks, and 40,000 miles for in city, mixed traffic heavy-duty diesel trucks

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07C281SWK |
| Best Sellers Rank | #554,693 in Automotive ( See Top 100 in Automotive ) #1,656 in Motor Oils |
| Brand | Triax |
| Brand Name | Triax |
| Compatible with Vehicle Type | Truck |
| Container Type | Pail |
| Customer Reviews | 4.3 out of 5 stars 56 Reviews |
| Liquid Volume | 640 |
| Manufacturer | TRIAX LUBRICANTS LLC |
| Manufacturer Part Number | TRXULT1540CK |
| Package Information | Pail |
| UPC | 852771008460 |
| Unit Count | 512 Fluid Ounces |
| Vehicle Service Type | Truck |
| Viscosity | 15W-40 |

## Product Details

- **Brand:** Triax
- **Liquid Volume:** 640
- **Package Information:** Pail
- **Vehicle Service Type:** Truck
- **Viscosity:** 15W-40

## Images

![Fleet Ultra 15W-40 CK-4 API Licensed Synthetic Blend, Moly and Boron Performance Boosted, Heavy Duty Diesel Engine Oil, OEM Compatible with Volvo, Mack, Cummins, DD (5 Gallon) - Image 1](https://m.media-amazon.com/images/I/71sU11L4poL.jpg)

## Available Options

This product comes in different **Size** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ My go to oil
*by B***P on September 12, 2023*

Absolutely love this oil for my 99 Ford F250 Super Duty 7.3. I decided to try this about a year ago and it does a great job. I also use the Archoil additive and have never had any leakage issues and my temperatures are great. My injectors seem quieter with this oil than with regular oil and it does a great job keeping everything clean. When I removed my valve covers I didn’t have any grime or anything on the inside of the covers or in any spots on the heads. For the price of this oil I used to get about 4 gallons so it’s a great value for the money…plus you get another bucket to use around the shop or house when you clean all the oils out.

### ⭐⭐⭐⭐⭐ IT REALLY DOES WORK.
*by E***C on January 12, 2019*

Changed to this oil in my 2000 f250 7.3 w 314k miles on it [only 17 miles ago] and it already starts faster cold and seems quieter as well. hoping for better mileage and longer engine life. driving 300 miles tomorrow so I will let you know more after that. ……………..So...., 309 miles. 17.4mpg. was only getting around 15.5 before, tried to keep my speed below 65 and let the engine torque do all the work. engine noise is down too. ...Im very happy with this oil. 1/18/2019 update... continues to start faster than before, runs better, quieter and making me happy. no more rotella or delo for me! update 2/26/22 Still using this oil, best 7.3 oil I've ever used. Update 6/8/22 Still love this oil, used on a friends 2002 f350 7.3, he said his truck was never this quiet. I change my oil at 7500 miles due to it only being used for towing and short trips in town, would definitely keep it in over 10k if lots of hiway use. 11/29/2024, still buying this oil, love it. wish s7 was still available.

### ⭐⭐⭐⭐⭐ Amazing oil for my 6.0 L PSD
*by M***K on October 2, 2019*

Installed this oil late in 2018. Wanted to wait to review it until I had 6,000 miles and two oil analyses on it. As most of you know the Ford 6.0 L diesel is hard on oil, shears it down from 15W/40 to 15W/30 in a heart beat. Well, not this oil. After 6,000 miles of towing at 19,000 GVW this oil is still 15W/40 and has a TBN of 5.2. Which means it could have gone another 6,000 miles, no problem. I have changed the transmission and rear end over to Triax products as well. Nothing better!

## Frequently Bought Together

- TRIAX Fleet Ultra 15W-40 CK-4 API Licensed Synthetic Blend, Moly and Boron Performance Boosted, Heavy Duty Diesel Engine Oil, OEM Compatible with Volvo, Mack, Cummins, DD (5 Gallon)
- Motorcraft- Oil Filter
- Motorcraft FD-4616 Fuel Filter

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*Product available on Desertcart Argentina*
*Store origin: AR*
*Last updated: 2026-03-02*