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Description
gl-5 gear oil Red Line 75W90NS GL-5 Gear OilRed Line 75W90 NS GL 5 gear oil is designed for transmissions and transaxles helping to slow synchros for easier shifting across a broad temperature range. This is recommended for Evo 4 9 high torque builds. Also suitable with some Ferrari, Subaru Porsche, Dodge, Jeep and GM models. See compatibility below. Sold individually as needed, price is for 1 quart or 1 gallon. For Evo 4 9 Transmission: Recommended for high torque applications. Use 3 quarts in
Red Line 75W90 NS GL-5 gear oil is designed for transmissions and transaxles helping to slow synchros for easier shifting across a broad temperature range. This is recommended for Evo 4-9 high torque builds. Also suitable with some Ferrari, Subaru Porsche, Dodge, Jeep and GM models. See compatibility below. Sold individually as needed, price is for 1 quart or 1 gallon.
For Evo 4-9 Transmission:
Recommended for high torque applications.
Use 3 quarts in the transmission.
| Bottle Size: | Part Number: | UPC: |
| 1 Quart | 58304 | 00083522583046 |
| 1 Gallon | 58305 | 00083522583053 |
Shipping Notes:
• This item ships by ground to the Lower 48 Continental United States ONLY
• Does not ship to AK, HI, PR or out of the USA
• Not available for Overnight Shipping
More Info:
RED LINE 75W90NS high-performance gear oil is a fully-synthetic formula with ester base stocks, designed for use in manual transmissions and transaxles that require GL-5 lubricants. This non-slip formula is formulated for shear stability, less gear noise and consistent viscosity. Extreme pressure (EP) additives allow for use with hypoid gears, but the lack of friction modifiers causes less slipperiness for proper synchronizer operations. Friction modifier can be added or used to customize limited-slip differential operation.
- Designed for transmissions and transaxles - helps to slow synchros for easier shifting across a broad temperature range
- Popular in Ferrari, Porsche, Mitsubishi and Subaru transaxles
- Muscle Car applications like Ford Top Loader, Muncie transmissions, Borg-Warner T-10 and Super T-10
- Contains extreme pressure additives like our 75W90 GL-5 oil, but lacks friction modifiers to balance slipperiness
- Improved copper corrosion protection to prolong synchro life
- Helps with lock-up on weak limited-slip differentials-compatible with Red Line Limited Slip Friction Modifier for tuning slippage
- Also used with clutch-type LSDs in racing for maximum lock up
- Recommended for API GL-5, GL-6, MT-1, MIL-L-2105E and SAE J2360
- Non corrosive formula, safe for use with all synchro materials
Typical Properties:
| API Service Class | GL 5+ |
| SAE Viscosity Grade (Gear Oil) | 75W90 |
| Vis @ 100°C, cSt | 15.6 |
| Vis @ 40°C, cSt | 90.4 |
| Viscosity Index | 185 |
| Pour Point, °C | -45 |
| Pour Point, °F | -49 |
| Brookfield Viscosity @ -40°C, Poise | 400 @-40°C |
OEM Compatibility:
Alfa Romeo
Agip 75W-90 SX
Agip SXA 75W-90
Dodge/Jeep 4549636
Ferrari 75W90
GM 88862475
GM 88862476
Mobil Mobilube 75W-90 SHC
Mobil Delvac 75W-90
Mobil Mobilube PTX 75W-90
Porsche 000 043 204 19
Porsche 000 043 204 71
Porsche 000 043 210 12
Porsche 000 043 304 71
Porsche 000 043 305 00
Porsche 000 043 305 48
Porsche Mobilube PTX
Porsche N-052-911-CO
Porsche SHC 75W90
Spirax S5 ATE
Shell Spirax EP 90
Shell Transaxle Oil 75W-90
Shell Spirax S5 ATE 75W-90
Shell TF 1055
Subaru SOA635011
T-10/Top Loader/Muncie
See more Red Line Products
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
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- Delivery to the USA:
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- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
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4.2 ★★★★★
Based on 1140 reviews
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Product Reviews
★★★★★ 5
Best Magnesium source!
Flavor Name: Unflavored, Size: 90 Count (Pack of 1), Flavor Name: Unflavored, Size: 90 Count (Pack of 1)
I have tried many forms of Magnesium in the past, it’s an essential mineral for the body (regulates over 300 functions). It helps with sleep, blood pressure, cognitive function, mood, muscle cramps, and ATP production (the powerhouse of the cell).
Science talk aside, I have tried Magnesium Glycinate and Citrate, and they can do a number on the gut, moving things along too quickly! Magnesium L-threonate has become very popular, but I am very picky about my supplements and the companies that make them. Jarrow Formulas is top notch!
I have started looking for supplements that are more “bio-available” as they are better absorbed and used by the body. This supplement does all of the above, without upsetting my gut and making it overactive.
I ran out of this supplement a few months ago, money was really tight, and it really affected my sleep, which is priceless! It also has L-threonate, which promotes sleep and positive mood. I am happy to have this back in repertoire, combined with vitamin D once a week (50,000IU), and Calcium Hydroxyapatite (see my other reviews, also super bioavailable).
If you are looking for a Magnesium source that helps you sleep and regulate body functions without the side effects on your gut, this is a standout choice that works great!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 4, 2026
★★★★★ 5
My Monthly Magnesium Supplement
Flavor Name: Unflavored, Size: 90 Count (Pack of 1)
I have been ordering the Jarrow Formulas Magnesium L-Threonate, MagMind on repeat every month because it has become an essential part of my routine. I take it consistently to support brain health, memory, and overall cognitive function, and I’ve noticed it helps me feel more focused and mentally sharp. The capsules are easy to take, and the supplement seems to absorb well, which is important for magnesium effectiveness. I appreciate that it’s high-quality and reliable, which is why I keep coming back every month without hesitation.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 7, 2026
★★★★★ 5
Jarrow is a trusty brand, Magmind is superior for cognition, spatial relations and SLEEP QUALITY - UPDATED REVIEW
Flavor Name: Unflavored, Size: 90 Count (Pack of 1)
I have been using Jarrow Formula supplements for a number of years, especially the Vitamin B12 - methylcobalamin and Vitamin K2 - MK7 supplements. I have been impressed with their continuing development of new *effective* products at a great price point.
My husband and I have been taking approximately a gram a day of supplement Magnesium (cheaper products) for almost 5 years now. In that time we have cured his former type 2 diabetes (after almost a 2 decade battle with medicated fasting BGs in the 500s at one point!) and we have almost completely reversed his hypertension of many years as well has have turned his end stage Severe Congestive Heart Failure around so he's relatively free of symptoms. I credit not only the magnesium, but also high doses of Vitamin D (ALWAYS taken with magnesium and fish oil!!), a whole foods source multi, the Sinatra Protocols for supplements as found in the back of
and a number of minerals especially trace minerals as found in
.
I was looking into research on magnesium and the brain when I ran into the MIT study published in 2010 showing magnesium L-threonate is the only form of magnesium to cross the blood-brain barrier and showed observable improvements in cognitive measures. Interesting. So we bought a bottle at our local neighborhood nutrition shop after a discussion with the owner, a couple I have come to trust during our many battles with the medical establishment.
Jarrow Formulas of magnesium L-threonate as Magmind is a very cost-effective source. To further economize we are still taking our regular magnesium supplement 3 times a day (750 mg) then taking this form of magnesium as part of our bed time routine (replacing the 4th magnesium of the day). I am genuinely impressed. Our sleep has improved yet another notch, which is saying something since the 5 years of magnesium supplementation meant we already had really good sleep quality. What I have noticed is that after multiple head trauma injuries (including a serious concussion earlier this year) my previously very high level of spatial relations was slipping. Now with Jarrow I feel I'm getting that edge back. I am very impressed. I will update again with further results after we've been taking this formula longer.
2015 UPDATE - in the years since we first tried MagMind I've referred hundreds of people to try this quality supplement with great results. We've since learned to couple magnesium with taurine for even greater results. Taurine is VERY well documented to improve the fluidity of electrolytes within the cells including within the brain.
NOVEMBER 2016 UPDATE:
Well, here we are 4 years later. We still personally use and recommend MagMind. What we discovered though, since he was put on Armour Thyroid by our primary care he no longer seems to be "leaking" magnesium hence we've cut magnesium supplementation waaayy back. Plus we soak in epsom salts far more. Magnesium is still vital however we're no longer "taking a gram a day."
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 15, 2012
★★★★★ 4
Works like magnesium, not certain on brain benefits. I like the brand.
Flavor Name: Unflavored, Size: 90 Count (Pack of 1)
I take magnesium near-daily and have for some time due to my diet. Mostly it's glycinate, though sometimes I'll take some citrate. This is my first experiment with l-threonate.
Before I get into this, I am not taking this as directed. I take 2 capsules during the day and usually take a different type of magnesium toward evening. I have about 40 capsules left, so I've taken a bit more than half the bottle so far.
Supposedly magnesium l-threonate may give you brain benefits over other types of magnesium. If it does, I'm not sure. It seems to have the same, general magnesium benefits for relaxation, sleep, muscles and nerves, but I don't notice any clear indication that my brain is working better: I'm thinking clearer, faster or am sharper mentally. This could be happening to a small degree, but other changes I've made could lead to this as well, so the waters are muddy there.
I'm going to cycle back to magnesium glycinate after I'm done with this bottle, or maybe open up my magnesium optimizer (also by Jarrow -- magnesium malate, b6, potassium and taurine), then come back to this again. See if there's any noticeable difference in my mental capabilities or focus. If I seem to see an association, I'll update this.
I like the brand. I've used their Magnesium Optimizer before and was pleased with that (bought another bottle), their fulvic acid / shilajit -- that seemed to work. I'm a fan. This magnesium is more expensive than other types, but at present I'm not sure that extra cost is worth it over a different type of magnesium.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 23, 2023
★★★★★ 5
Tremendously helpful for a restful nights sleep!
Flavor Name: Unflavored, Size: 90 Count (Pack of 2)
Jarrow is our go to brand for health supplements. Magmind is amazing - helps tremendously well for restful sleep. Even helps calm my wife's restless legs at night.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 9, 2026
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