---
product_id: 504059816
title: "Ultra 1Plus SAE 15W-40 Full Synthetic Heavy-Duty Diesel Engine Oil - 15W 40 Motor Oil API CK-4/SN (1 Gallon)"
brand: "ultra 1plus"
price: "€ 71.09"
currency: EUR
in_stock: true
reviews_count: 8
category: "Ultra 1 Plus"
url: https://www.desertcart.ie/products/504059816-ultra-1plus-sae-15w-40-full-synthetic-heavy-duty-diesel
store_origin: IE
region: Ireland
---

# Reduced oil consumption - efficiency boost 220°C flash point - thermal resilience API CK-4/SN certified - top-tier engine protection Ultra 1Plus SAE 15W-40 Full Synthetic Heavy-Duty Diesel Engine Oil - 15W 40 Motor Oil API CK-4/SN (1 Gallon)

**Brand:** ultra 1plus
**Price:** € 71.09
**Availability:** ✅ In Stock

## Summary

> ⚡ Power your diesel with the synthetic edge that keeps you ahead of the pack!

## Quick Answers

- **What is this?** Ultra 1Plus SAE 15W-40 Full Synthetic Heavy-Duty Diesel Engine Oil - 15W 40 Motor Oil API CK-4/SN (1 Gallon) by ultra 1plus
- **How much does it cost?** € 71.09 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ie](https://www.desertcart.ie/products/504059816-ultra-1plus-sae-15w-40-full-synthetic-heavy-duty-diesel)

## Best For

- ultra 1plus enthusiasts

## Why This Product

- Trusted ultra 1plus brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Fuel Efficiency Champion:** Minimizes oil consumption across all driving conditions, saving you time and money on maintenance.
- • **Future-Ready Versatility:** Optimized for 2020+ diesel engines with advanced emission controls, yet perfectly compatible with older models.
- • **Next-Level Engine Defense:** Full synthetic formula shields against wear, deposits, and soot buildup for longer engine life.
- • **Unrivaled Thermal Stability:** Maintains viscosity and performance even under extreme heat, protecting your engine from breakdown.
- • **Certified Performance Excellence:** Exceeds API CK-4, CJ-4, CI-4 standards ensuring compatibility with the latest diesel engines and emission systems.

## Overview

Ultra 1Plus SAE 15W-40 Full Synthetic Heavy-Duty Diesel Engine Oil delivers advanced protection and superior performance for modern and legacy diesel engines. With a high flash point of 220°C and API CK-4/SN certification, it ensures thermal stability, reduces oil consumption, and supports emission system durability—making it the go-to choice for professionals demanding reliability and efficiency.

## Description

Buy Ultra 1Plus SAE 15W-40 Full Synthetic Heavy-Duty Diesel Engine Oil - 15W 40 Motor Oil API CK-4/SN (1 Gallon): Motor Oils - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: I like the packaging - Excellent product
Review: Runs cool, well kinda, in Kubota BX2230 - After 20 years I decided to convert my Kubota BX2230 to synthetic oil since everything I've read indicates synthetic is superior in every way. I wish I could say that the tractor now purrs like a kitten at idol but that would not be honest. it still rattles and shakes like a 1960's rock and roll gogo girl. But, that's okay. As long as it keeps running I will be happy.

## Features

- Advanced Protection: Ultra1Plus SAE 15W-40 Full Synthetic Heavy-Duty Motor Oil provides enhanced protection against oil oxidation, viscosity loss due to shear, and oil aeration, as well as protection against catalyst poisoning, particulate filter blocking, engine wear, piston deposits, degradation of low- and high-temperature properties, and soot-related viscosity increase.
- Superior Performance: This motor oil is formulated with synthetic base oils and a premium additive package to exceed the performance criteria of API CK-4, CJ-4, CI-4 with CI-4 PLUS, CI-4, and CH-4. It can effectively lubricate engines calling for those API Service Categories.
- Stay-in-Grade Performance: The strong shear stability of Ultra1Plus SAE 15W-40 Full Synthetic Heavy-Duty Motor Oil provides stay-in-grade performance, ensuring the oil maintains its viscosity and protects the engine against thermal breakdown at high temperatures.
- Reduced Oil Consumption: Full synthetic motor oil minimizes oil consumption in all types of driving conditions, helping to reduce the need for frequent oil top-ups and changes.
- Versatile Use: This oil is designed for use in high-speed four-stroke cycle diesel engines designed to meet 2020 model year on-highway and Tier 4 non-road exhaust emission standards as well as for previous model year diesel engines. It is especially effective at sustaining emission control system durability where particulate filters and other advanced after-treatment systems are used.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0B5Y1XWYQ |
| Automotive Fit Type | Universal Fit |
| Best Sellers Rank | #192,405 in Automotive ( See Top 100 in Automotive ) #895 in Motor Oils |
| Brand | ULTRA 1PLUS |
| Customer Reviews | 4.6 4.6 out of 5 stars (65) |
| Date First Available | April 15, 2022 |
| Flash Point | 220 Degrees Celsius |
| Item Weight | 7.39 pounds |
| Item model number | UL108 |
| Manufacturer | Ultrachem LLC |
| Manufacturer Part Number | UFS1540CK4SNG |
| Model | SAE 15W-40 Full Synthetic Heavy-Duty Motor Oil, API CK-4/SN |
| Product Dimensions | 4 x 8.25 x 11 inches |
| SAE J300 Viscosity Grade | 15W-40 |
| Size | 1 Gal (Most Popular) |
| Special Features | diesel |
| UPC | 810050658966 |
| Vehicle Service Type | Truck |
| Viscosity | 15W 40 SAE Grade |

## Product Details

- **Brand:** ULTRA 1PLUS
- **Liquid Volume:** 1 Gallons
- **Package Information:** US Gallon
- **Vehicle Service Type:** Truck
- **Viscosity:** 15W 40 SAE Grade

## Images

![Ultra 1Plus SAE 15W-40 Full Synthetic Heavy-Duty Diesel Engine Oil - 15W 40 Motor Oil API CK-4/SN (1 Gallon) - Image 1](https://m.media-amazon.com/images/I/81REEzr7aDL.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ I like the packaging
*by M***S on September 22, 2025*

Excellent product

### ⭐⭐⭐⭐⭐ Runs cool, well kinda, in Kubota BX2230
*by J***S on June 13, 2024*

After 20 years I decided to convert my Kubota BX2230 to synthetic oil since everything I've read indicates synthetic is superior in every way. I wish I could say that the tractor now purrs like a kitten at idol but that would not be honest. it still rattles and shakes like a 1960's rock and roll gogo girl. But, that's okay. As long as it keeps running I will be happy.

### ⭐⭐⭐⭐⭐ Great price, beats all retailers
*by W***T on April 21, 2024*

Great price on great synthetic.

## Frequently Bought Together

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*Product available on Desertcart Ireland*
*Store origin: IE*
*Last updated: 2026-03-16*