Red Line 75W140 GL-5 Gear Oil 1 Quart - Universal
Red Line 75W140 GL-5 Gear Oil 1 Quart - Universal
Red Line
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PRODUCT DETAILS ▾
RallySport Direct is proud to bring you some of the best lubricants in the industry brought to you by Red Line.
Here, you are looking at the Red Line 75W140 GL-5 Gear Oil. This gear oil features an all-synthetic formula that has been designed to provide your differential with the highest degree of protection and contains the extreme pressure additives necessary for the ultimate protection for road cars and racing vehicles.
DETAILS:
- 75W140 GL-5 viscosity
- Fully-synthetic formula created from polyol ester-based stocks and offers excellent lubrication under extreme conditions
- High-viscosity index (VI) to provide relatively consistent viscosity and film thickness with varying temperature change
- Ester base stocks and friction modifiers provide additional slipperiness to lower operating temperatures by reducing the sliding friction in hypoid gears
- Superior shear stability and reduced oxidation compared to other synthetic and conventional gear oils
- Exceeds API GL-5 specifications
- Engineered to provide the highest degree of protection and improvement of differential efficiency for better mileage and longer drain intervals with less wear
- Contains additional friction modifiers for suitability and clutch-type limited-slip differentials for most LSDs, no additional friction modifiers are required
- Recommended for API GL-5, GL-6, MT-1, MIL-L-210SE, and SAE J2360
- Sold individually in (1) US Quart container
WHY WE CARRY THIS ▾
We only list parts we’d run ourselves or recommend to a friend building a real car. If it feels vague, unverified, or inconsistent, it doesn’t make the cut.
- Fitment-first mindset — no “universal” roulette
- Brand reputation matters — we favor proven manufacturing
- Support that actually responds with real answers
WHAT TO EXPECT ▾
This is the clean path: correct fitment, clean install, and results that match the intent.
- Install-ready experience with correct mounting where provided
- Finish that holds up to real driving, not just photos
- Selections on this page drive the exact fitment shipped
TRUST, BUILT INTO THE PROCESS.
Anyone can list parts. We curate what belongs on a serious build. Our goal is simple: fewer surprises, cleaner installs, and confidence when you hit “Buy.”
Fitment checked
We prioritize vehicle-specific listings and clear selection logic so you’re not gambling on compatibility.
Brand discipline
Proven manufacturing and consistent quality matter more than hype. We bias toward what actually holds up.
Real support
If you have a question, you’ll get a human answer that helps you finish the build — not a copy-paste shrug.
RallySport Direct is proud to bring you some of the best lubricants in the industry brought to you by Red Line.
Here, you are looking at the Red Line 75W140 GL-5 Gear Oil. This gear oil features an all-synthetic formula that has been designed to provide your differential with the highest degree of protection and contains the extreme pressure additives necessary for the ultimate protection for road cars and racing vehicles.
DETAILS:
- 75W140 GL-5 viscosity
- Fully-synthetic formula created from polyol ester-based stocks and offers excellent lubrication under extreme conditions
- High-viscosity index (VI) to provide relatively consistent viscosity and film thickness with varying temperature change
- Ester base stocks and friction modifiers provide additional slipperiness to lower operating temperatures by reducing the sliding friction in hypoid gears
- Superior shear stability and reduced oxidation compared to other synthetic and conventional gear oils
- Exceeds API GL-5 specifications
- Engineered to provide the highest degree of protection and improvement of differential efficiency for better mileage and longer drain intervals with less wear
- Contains additional friction modifiers for suitability and clutch-type limited-slip differentials for most LSDs, no additional friction modifiers are required
- Recommended for API GL-5, GL-6, MT-1, MIL-L-210SE, and SAE J2360
- Sold individually in (1) US Quart container
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