---
product_id: 497839621
title: "ULTRA 1PLUS SAE 15W-40 Full Synthetic Heavy-Duty Diesel Engine Oil - 15W 40 Motor Oil API CK-4/SN (4 Gallons)"
brand: "ultra 1plus"
price: "$836"
currency: NZD
in_stock: true
reviews_count: 8
category: "Ultra 1 Plus"
url: https://www.desertcart.nz/products/497839621-ultra-1plus-sae-15w-40-full-synthetic-heavy-duty-diesel
store_origin: NZ
region: New Zealand
---

# Boosts fuel efficiency Stable viscosity under stress Superior engine wear protection ULTRA 1PLUS SAE 15W-40 Full Synthetic Heavy-Duty Diesel Engine Oil - 15W 40 Motor Oil API CK-4/SN (4 Gallons)

**Brand:** ultra 1plus
**Price:** $836
**Availability:** ✅ In Stock

## Summary

> 🛢️ Power your diesel with the ULTRA edge – because your engine deserves the best.

## 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 (4 Gallons) by ultra 1plus
- **How much does it cost?** $836 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nz](https://www.desertcart.nz/products/497839621-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

- • **Engine Armor:** Full synthetic formula that slashes wear and extends engine life for heavy-duty reliability.
- • **Clean Machine:** Fights soot, sludge, and oxidation to keep your engine spotless and running longer.
- • **Universal Power:** Exceeds multiple API standards, making it the go-to oil for a wide range of diesel engines.
- • **Viscosity Vigor:** Strong shear stability keeps oil thick and effective even in extreme conditions.
- • **Fuel-Smart Formula:** Minimizes oil consumption, translating to better fuel economy and fewer pit stops.

## Overview

ULTRA 1PLUS SAE 15W-40 is a full synthetic heavy-duty diesel engine oil designed to protect and enhance engine performance. It offers superior wear reduction, maintains optimal viscosity under stress, combats deposits and oxidation, improves fuel efficiency, and meets or exceeds API CK-4 and related standards. Packaged in a convenient 4-gallon value size, it’s engineered for universal fit across diesel trucks and heavy machinery.

## Description

Buy ULTRA 1PLUS SAE 15W-40 Full Synthetic Heavy-Duty Diesel Engine Oil - 15W 40 Motor Oil API CK-4/SN (4 Gallons): 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

- SUPERIOR ENGINE PROTECTION: U1P SAE 15W-40 Full synthetic formula reduces wear and extends engine life.
- ENHANCED PERFORMANCE: Strong shear stability maintains oil viscosity for optimal performance under demanding conditions.
- COMBATS DEPOSITS & OXIDATION: Fights soot, sludge, and oil breakdown for cleaner engines and longer oil life.
- FUEL EFFICIENCY: Minimizes oil consumption for improved fuel economy in various driving conditions.
- BROAD COMPATIBILITY: Exceeds API CK-4, API CJ-4, CI-4/CI-4+, CI-4, and CH-4 standards, suitable for a wide range of diesel engines.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0B5VGHM4D |
| Automotive Fit Type | Universal Fit |
| Best Sellers Rank | #166,567 in Automotive ( See Top 100 in Automotive ) #779 in Motor Oils |
| Brand | ULTRA 1PLUS |
| Customer Reviews | 4.6 4.6 out of 5 stars (66) |
| Date First Available | April 17, 2022 |
| Flash Point | 428 Degrees Fahrenheit |
| Item Weight | 29.8 pounds |
| Item model number | UL108 |
| Manufacturer | Ultrachem LLC |
| Manufacturer Part Number | UFS1540CK4SN-BG |
| 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 | 4 Gal (Value Pack) |
| UPC | 810050658973 |
| Vehicle Service Type | Truck |
| Viscosity | 15W 40 SAE Grade |

## Product Details

- **Brand:** ULTRA 1PLUS
- **Liquid Volume:** 4 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 (4 Gallons) - Image 1](https://m.media-amazon.com/images/I/51RNNTS2NvL.jpg)
![ULTRA 1PLUS SAE 15W-40 Full Synthetic Heavy-Duty Diesel Engine Oil - 15W 40 Motor Oil API CK-4/SN (4 Gallons) - Image 2](https://m.media-amazon.com/images/I/71FY2+FJzmL.jpg)
![ULTRA 1PLUS SAE 15W-40 Full Synthetic Heavy-Duty Diesel Engine Oil - 15W 40 Motor Oil API CK-4/SN (4 Gallons) - Image 3](https://m.media-amazon.com/images/I/71NPTeipZVL.jpg)
![ULTRA 1PLUS SAE 15W-40 Full Synthetic Heavy-Duty Diesel Engine Oil - 15W 40 Motor Oil API CK-4/SN (4 Gallons) - Image 4](https://m.media-amazon.com/images/I/71wCMF6klpL.jpg)
![ULTRA 1PLUS SAE 15W-40 Full Synthetic Heavy-Duty Diesel Engine Oil - 15W 40 Motor Oil API CK-4/SN (4 Gallons) - Image 5](https://m.media-amazon.com/images/I/81HWujrYsnL.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.

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**Shop now:** [https://www.desertcart.nz/products/497839621-ultra-1plus-sae-15w-40-full-synthetic-heavy-duty-diesel](https://www.desertcart.nz/products/497839621-ultra-1plus-sae-15w-40-full-synthetic-heavy-duty-diesel)

---

*Product available on Desertcart New Zealand*
*Store origin: NZ*
*Last updated: 2026-02-12*