---
product_id: 267048105
title: "10121 SAE 75W-140 Synthetic Gear Oil/Transmission and Differential Lube - 1 Quart"
brand: "lucas oil"
price: "22881 Ft"
currency: HUF
in_stock: true
reviews_count: 6
category: "Lucas Oil"
url: https://www.desertcart.hu/products/267048105-10121-sae-75w-140-synthetic-gear-oil-transmission-and-differential
store_origin: HU
region: Hungary
---

# Long-lasting lubrication High-temp stability 75W-140 viscosity grade 10121 SAE 75W-140 Synthetic Gear Oil/Transmission and Differential Lube - 1 Quart

**Brand:** lucas oil
**Price:** 22881 Ft
**Availability:** ✅ In Stock

## Summary

> ⚙️ Shift into high gear with Lucas Oil – where performance meets precision!

## Quick Answers

- **What is this?** 10121 SAE 75W-140 Synthetic Gear Oil/Transmission and Differential Lube - 1 Quart by lucas oil
- **How much does it cost?** 22881 Ft with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hu](https://www.desertcart.hu/products/267048105-10121-sae-75w-140-synthetic-gear-oil-transmission-and-differential)

## Best For

- lucas oil enthusiasts

## Why This Product

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

## Key Features

- • **Extended Gear Life:** Super-slick synthetic base reduces wear and tear, extending differential and transmission lifespan.
- • **Noise Reduction Tech:** Special additives minimize gear noise for a quieter, more refined ride.
- • **Ultimate Heat Resistance:** Keeps your gears cool under pressure, no breakdowns even in extreme temps.
- • **Cost-Effective Performance:** Premium synthetic quality at a price that keeps your budget happy without compromise.
- • **Precision Viscosity Control:** 75W-140 synthetic formula ensures smooth, consistent performance across all driving conditions.

## Overview

Lucas Oil 10121 SAE 75W-140 Synthetic Gear Oil is a premium synthetic lubricant engineered for heavy-duty and high-performance applications. It features advanced additives that reduce gear noise, enhance lubricity, and maintain viscosity under high temperatures, making it ideal for limited slip differentials and transmissions. Trusted by professionals and enthusiasts alike, it delivers long-lasting protection and smooth operation at an affordable price point.

## Description

Lucas Pure Synthetic Gear Oils are super-slick, long lasting lubricants designed especially for heavy duty or high performance applications where regular gear lubricants just aren't good enough. They contain a special additive package that increases lubricity and insures less gear noise and longer bearing life. Designed to stand up to high temperatures without losing its lubricity. Excellent for use in limited slip differentials.

Review: Did not solve my problem - Did not solve my problem, noise is increasing and now I can feel hard acceleration.
Review: I needed to do a fluid change on the rear diff of my 2002 F150 with factory limited slip. I have never used any Lucas product before, only seen their oil additives (and I don't use additives at all, Lucas or other brands). I have read some bad reviews of Lucas gear oils, but most seem to be complaining of issues in transmissions or transfer cases, not differentials, so I figured why not try it. It meets all the specs and is cheaper than other synthetic fluids of the same viscosity (even cheaper than Supertech 75w-140 synthetic from Walmart). I did notice this fluid does not have as strong a foul odor like some gear oils do. It still smelled, but not as bad as others I have used before. I changed the fluid with no major issues and it seems to work just fine. I did add the Motorcraft XL-3 Friction Modifier to the differential. The Lucas fluid is supposed to contain Friction Modifier and it says no need to add more, but I have heard of many people having rear end chatter with the OEM Ford LS no matter what fluid is used unless the Ford friction modifier is added too, so I did it. I was having some chattering from the rear end when doing sharp turns from a stop before I changed the fluid, no issues at all after the change. I only gave it 4 stars for now since I don't know long term how this fluid holds up. If it is still good in a year, I will change it to 5 stars. As of right now, I would not hesitate to use it again. Edit 7/10/15: Well, it is a year later and nothing to report except truck is still running fine with no noise or leaks from the rear end. Seems like a solid choice for gear oil for me. Will be on the top of my list if I need more. 5 star rating now. another edit 9/16/16: well, no more updates on this fluid. I had to drain my rear diff (had to replace the anchor plate for the passenger side brake caliper, which requires removing the axle shaft and draining the fluid). I debated re-using the fluid, but decided not too. The fluid came out looking almost like it went in. Only had 10,000 miles or so on it though. I did not use more Lucas fluid for the refill, I just went with some Supertech gear oil from Walmart instead. Seems the price of the Lucas has gone up and cost as much as other name brand fluids, loosing its biggest advantage for me (low cost).

## Features

- Cools and quiets
- High performance
- AFFORDABLE SOLUTIONS
- Super-slick long lasting lubricant

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B000BCKWVE |
| Best Sellers Rank | #2,025 in Automotive ( See Top 100 in Automotive ) #54 in Automotive Oils |
| Brand | Lucas Oil |
| Customer Reviews | 4.8 4.8 out of 5 stars (667) |
| Date First Available | 7 August 2012 |
| Item Weight | 898 g |
| Item model number | LUC10121 |
| Manufacturer | Lucas Oil |
| Manufacturer Part Number | LUCA10121 |
| Model | Lucas Oil 10121 Synthetic SAE 75W-140 Gear Oil - 1 Quart |
| OEM Part Number | 10121 |
| Product Dimensions | 8.38 x 8.38 x 29.85 cm; 898 g |
| Viscosity | 75W-140 |

## Product Details

- **Brand:** Lucas Oil
- **Liquid volume:** 1 Quarts
- **Material:** Blend
- **Package information:** Bottle
- **Recommended uses for product:** Automotive

## Images

![10121 SAE 75W-140 Synthetic Gear Oil/Transmission and Differential Lube - 1 Quart - Image 1](https://m.media-amazon.com/images/I/61gA8zEIi4L.jpg)

## Questions & Answers

**Q: so this can be used in rear axle and also in gear box? is that right ?**
A: I used it in the rear axle (which technically contains gears). You cannot use this in the transmission

**Q: Can use in worm gear saw?**
A: Can you be more specific to your use of the oil? Are you wanting to use to lubricant the tool? Or to use as a cutting lubricant?

**Q: Is this okay to use on a regular differential(non limited slip)?**
A: I believe so.

**Q: Can this be used on Differential 2021 toyota corolla manual??**
A: Yes

## Customer Reviews

### ⭐ Did not solve my problem
*by M***D on 19 September 2025*

Did not solve my problem, noise is increasing and now I can feel hard acceleration.

### ⭐⭐⭐⭐⭐ Review
*by N***1 on 26 June 2014*

I needed to do a fluid change on the rear diff of my 2002 F150 with factory limited slip. I have never used any Lucas product before, only seen their oil additives (and I don't use additives at all, Lucas or other brands). I have read some bad reviews of Lucas gear oils, but most seem to be complaining of issues in transmissions or transfer cases, not differentials, so I figured why not try it. It meets all the specs and is cheaper than other synthetic fluids of the same viscosity (even cheaper than Supertech 75w-140 synthetic from Walmart). I did notice this fluid does not have as strong a foul odor like some gear oils do. It still smelled, but not as bad as others I have used before. I changed the fluid with no major issues and it seems to work just fine. I did add the Motorcraft XL-3 Friction Modifier to the differential. The Lucas fluid is supposed to contain Friction Modifier and it says no need to add more, but I have heard of many people having rear end chatter with the OEM Ford LS no matter what fluid is used unless the Ford friction modifier is added too, so I did it. I was having some chattering from the rear end when doing sharp turns from a stop before I changed the fluid, no issues at all after the change. I only gave it 4 stars for now since I don't know long term how this fluid holds up. If it is still good in a year, I will change it to 5 stars. As of right now, I would not hesitate to use it again. Edit 7/10/15: Well, it is a year later and nothing to report except truck is still running fine with no noise or leaks from the rear end. Seems like a solid choice for gear oil for me. Will be on the top of my list if I need more. 5 star rating now. another edit 9/16/16: well, no more updates on this fluid. I had to drain my rear diff (had to replace the anchor plate for the passenger side brake caliper, which requires removing the axle shaft and draining the fluid). I debated re-using the fluid, but decided not too. The fluid came out looking almost like it went in. Only had 10,000 miles or so on it though. I did not use more Lucas fluid for the refill, I just went with some Supertech gear oil from Walmart instead. Seems the price of the Lucas has gone up and cost as much as other name brand fluids, loosing its biggest advantage for me (low cost).

### ⭐⭐⭐⭐⭐ Review
*by C***E on 6 February 2023*

Todo correcto. Producto y envío ok. Volveré a comprar seguro. Contacto con el vendedor ok.

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*Product available on Desertcart Hungary*
*Store origin: HU*
*Last updated: 2026-03-09*