# TLDR Review: Mobil 1 75W-90 Synthetic Gear Lube

*Published: 2025-03-13 | Updated: 2025-03-13 | Source: https://shopsavvy.com/reviews-tldr/mobil-1-75w-90-synthetic-gear-lube*

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## Product: Mobil 1 75W-90 Synthetic Gear Lube
**Brand:** Mobil 1

## Pros
- Recommended by Subaru, suitable for engine transmission and rear differential maintenance.
- Works effectively at 40k mile intervals, maintaining performance over time.
- Contains limited slip additives and friction modifiers, enhancing performance in differentials.
- Consistently reliable with no issues over 20 years of use.
- Positive user experiences lead to repeat purchases among satisfied customers.
- Comparable performance to more expensive GM oils.
- Suitable for a variety of vehicles, including Toyota manual transmissions and GMC Sierras.
- Users find the quality of the synthetic oil good, with long life and resistance to heat.
- Emphasized quality for maintaining vehicles long-term.
- Seen as a good value for the price by users.

## Cons
- Difficulty finding at reasonable prices locally, with significant price differences noted.
- Pouring directly into the unit is challenging; requires additional tools to ease application.
- Experience with warranty claims was frustrating due to lack of recognition for defective parts.
- Competitor offers more convenient warranty options, potentially prompting brand switches.

## Bottom Line

Mobil 1 104361-UNIT 75W-90 Synthetic Gear Lube is a well-regarded, high-performance gear oil favored by a wide range of vehicle owners. It performs exceptionally well in maintaining long-term vehicle performance and is comparable to more expensive oils. Despite its challenges in application and warranty issues, it remains a strong choice for those prioritizing quality and reliability in synthetic gear lubricants.

## Pros vs Cons at a Glance

| Pros | Cons |
|------|------|
| Recommended by Subaru, suitable for engine transmission and rear differential maintenance. | Difficulty finding at reasonable prices locally, with significant price differences noted. |
| Works effectively at 40k mile intervals, maintaining performance over time. | Pouring directly into the unit is challenging; requires additional tools to ease application. |
| Contains limited slip additives and friction modifiers, enhancing performance in differentials. | Experience with warranty claims was frustrating due to lack of recognition for defective parts. |
| Consistently reliable with no issues over 20 years of use. | Competitor offers more convenient warranty options, potentially prompting brand switches. |
| Positive user experiences lead to repeat purchases among satisfied customers. |  |
| Comparable performance to more expensive GM oils. |  |
| Suitable for a variety of vehicles, including Toyota manual transmissions and GMC Sierras. |  |
| Users find the quality of the synthetic oil good, with long life and resistance to heat. |  |
| Emphasized quality for maintaining vehicles long-term. |  |
| Seen as a good value for the price by users. |  |

## Current Prices

| Retailer | Price | Availability |
|----------|-------|-------------|
| The Baltimore Auto Supply Co. | $9.78  | Check |
| Opentip | $9.80  | Check |
| Level Up Auto Parts | $10.36  | Check |
| Pit Stop USA | $10.97  | Check |
| A-1 Racing Products | $10.99  | Check |
| A-1 Racing Products | $10.99  | Check |
| ACR Performance | $10.99  | Check |
| C6 Performance | $10.99  | Check |
| Car Shop | $10.99  | Check |
| CI Motorsports | $10.99  | Check |
| Summit Racing -> eBay | $10.99  | Check |
| Autoplicity.com | $11.90  | Check |
| 90racing | $11.95  | Check |
| BigR | $11.99  | Check |
| Parts Universe | $11.99  | Check |
| RaceChoice | $11.99  | Check |
| Fleet Farm | $12.29  | Check |
| Gearheads Performance Store | $12.87  | Check |
| SkyGeek | $13.75  | Check |
| FinditParts | $13.84  | Check |

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*About this review: We pulled together findings from professional and user reviews, and cross-referenced them with ShopSavvy's pricing data from thousands of retailers to give you the short version.*