--- product_id: 24084581 title: "50505 MT-85 Manual Transmission 75W85 GL-4 Gear Oil - 1 Gallon" brand: "red line" price: "€ 209.29" currency: EUR in_stock: true reviews_count: 13 category: "Red Line" url: https://www.desertcart.hr/products/24084581-50505-mt-85-manual-transmission-75w85-gl-4-gear-oil store_origin: HR region: Croatia --- # Quicker, smoother shifts even in cold climates 75W-85 viscosity for optimal gear protection Safe for brass synchros, prevents gear damage 50505 MT-85 Manual Transmission 75W85 GL-4 Gear Oil - 1 Gallon **Brand:** red line **Price:** € 209.29 **Availability:** ✅ In Stock ## Summary > ⚙️ Shift like a pro, protect like a boss! ## Quick Answers - **What is this?** 50505 MT-85 Manual Transmission 75W85 GL-4 Gear Oil - 1 Gallon by red line - **How much does it cost?** € 209.29 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/24084581-50505-mt-85-manual-transmission-75w85-gl-4-gear-oil) ## Best For - red line enthusiasts ## Why This Product - Trusted red line brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Brass Synchro Safe:** No reactive sulfurs, ensuring longevity of sensitive components - • **Cold Climate Ready:** Maintains slipperiness for quick shifts in low temperatures - • **Effortless Shifting:** Balanced friction control delivers silky smooth gear changes - • **Trusted Performance:** Red Line’s legacy since 1979 guarantees uncompromised quality - • **Precision Gear Protection:** Extends synchro life with advanced GL-4 synthetic formula ## Overview Red Line 50505 MT-85 is a premium synthetic 75W-85 GL-4 gear oil designed for manual transmissions. It offers superior gear and synchro protection, ensures smoother and quicker shifts even in cold weather, and is safe for brass synchros. Trusted by enthusiasts and professionals alike, it’s the go-to choice for vehicles like Nissan 350Z/370Z, Mitsubishi Evolution, and more, delivering lasting performance and preventing costly transmission wear. ## Description Product description Review: Fantastic product, Probably the best transmission fluid on the market - This stuff is fantastic, I'm never going with another transmission fluid ever again. My car shifts SO much smoother now both while cold and warmed up. It's so much less notchy. I drive a genesis coupe, and they have a tendency to grind 1st to 2nd or even 2nd to 3rd if you're driving "spiritedly". It happened to me several times and it was always such a horrible, cringe inducing feeling where I felt so bad to my poor car. After using this fluid I have yet to ever have this problem. Granted I've also upgraded the trans mount to polyurethane, and upgraded the shifter to a chassis mounted short shifter assembly. But still, this fluid is just the cherry on top. It shifts like a freaking dream now. Well worth the extra money. Grinding gears will eventually lead to a destroyed transmission, if this fluid keeps that problem from happening then I say an extra 30 bucks for a transmission fluid change over other brands is WELL worth it. It's such a joy to row through the gears now. Review: 80% improvement on my Z. Would recommend - Worked for me noticed 80% improvement in shifting and no transmission noise. ## Features - HIGH PERFORMANCE - Gear protection and longer synchro life. Recommended for GL-1, GL-3, and GL-4 applications, as well as where most special synchromesh fluids are specified - OFFERS QUICKER SHIFTS - Excellent gear and synchro protection, balanced friction control & slipperiness for easier shifting even in cold climates - SAFE FOR BRASS SYNCHROS - GL-4 Gear Oil lacks the reactive sulfurs found in most GL-5 oils that cause damage. Recommended for GL-1, GL-3 & GL-4 applications - POPULAR GEA OIL FOR - Nissan 350Z and 370Z (also most Maxima, Altima & Sentra), Mitsubishi Evolution, Hyundai, Kia and Quaife synchro manual trans applications - WHY RED LINE - Established in 1979, Red Line Products perform & protect better than any on the market. No compromises ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B019XB6FQO | | Best Sellers Rank | #15,290 in Automotive ( See Top 100 in Automotive ) #77 in Gear Oils | | Brand | Red Line | | Brand Name | Red Line | | Container Type | Can | | Customer Reviews | 4.8 out of 5 stars 888 Reviews | | Global Trade Identification Number | 00083522505055 | | Included Components | MT-85 75W85 GL-4 - 1 gallon | | Item Form | Oil | | Item Type Name | MT-85 75W85 GL-4 - 1 gallon | | Item Weight | 7 Pounds | | Liquid Volume | 128 Fluid Ounces | | Manufacturer | Red Line | | Material | Synthetic | | Model Number | 50505 | | Number of Items | 1 | | Package Information | Can | | Part Interchange Info | 50505 | | Part Number | 50505 | | Recommended Uses For Product | Automotive | | Specific Uses For Product | Manual transmission lubrication, specific vehicle models and transmissions | | UPC | 083522505055 | | Unit Count | 128.0 Fluid Ounces | | Viscosity | 75W-85 | ## Product Details - **Brand:** Red Line - **Package Information:** Can - **Liquid Volume:** 128 Fluid Ounces - **Item Weight:** 7 Pounds - **Recommended Uses For Product:** Automotive ## Images ![50505 MT-85 Manual Transmission 75W85 GL-4 Gear Oil - 1 Gallon - Image 1](https://m.media-amazon.com/images/I/71ah1WZ0rnL.jpg) ## Available Options This product comes in different **Size** options. ## Questions & Answers **Q: Help. I have 09 Tacoma 5 speed manual will this item work or any other recommendation?** A: If owners manual calls for a GL-4 oil then yes this is will be fine. Dont use GL-5 in a transmission that calls for GL-4. Sulpher in the oil will destroy the brass synchros and brass washers and parts. Redline is great but its not a miracle oil. **Q: work on 370z ?** A: MT-85 is specifically designed for the 370z. Take a look here: http://www.the370z.com/diy-section-do-yourself/8311-diy-transmission-oil-change.html **Q: Will this be compatible with my 2014 F34 335i rear non-limited slip differential?** A: This is not the correct fluid. You need 75w90 and this is 75w85. it's close but not the same. I would recommend the BMW Specific fluid for your car that is the correct spec. **Q: Can it use with Vespa Paige 50cc?** A: I purchased this oil for an older Hyundai with a manual transmission. I believe it is a formula specifically for Korean cars, and it worked remarkably well. With that said, I don't see where Vespa calls for this viscosity. Personally, I would stick with what they recommend. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Fantastic product, Probably the best transmission fluid on the market *by J***S on March 3, 2026* This stuff is fantastic, I'm never going with another transmission fluid ever again. My car shifts SO much smoother now both while cold and warmed up. It's so much less notchy. I drive a genesis coupe, and they have a tendency to grind 1st to 2nd or even 2nd to 3rd if you're driving "spiritedly". It happened to me several times and it was always such a horrible, cringe inducing feeling where I felt so bad to my poor car. After using this fluid I have yet to ever have this problem. Granted I've also upgraded the trans mount to polyurethane, and upgraded the shifter to a chassis mounted short shifter assembly. But still, this fluid is just the cherry on top. It shifts like a freaking dream now. Well worth the extra money. Grinding gears will eventually lead to a destroyed transmission, if this fluid keeps that problem from happening then I say an extra 30 bucks for a transmission fluid change over other brands is WELL worth it. It's such a joy to row through the gears now. ### ⭐⭐⭐⭐⭐ 80% improvement on my Z. Would recommend *by E***S on March 2, 2026* Worked for me noticed 80% improvement in shifting and no transmission noise. ### ⭐⭐⭐⭐⭐ awesome improvment *by B***H on January 29, 2017* I put this in a 2010 Nissan Altima Coupe - 6 speed manual. I live in Colorado, so you can imagine at times temperatures here are less than tropical. Over time my car really didn't like cold weather, in terms of going into gear, most noticeable when down shifting when it was below 0. At times I would have to fight a bit to get the gear I wanted, as the syncros would dislike the idea of the gear selection I made when it was brutally cold. So I decided to give this a try. I drained the MT-85 in my car - replaced it with this - the entire process took under 20 mins. Very quick, very easy to do. Call it easier than an oil change in most ways. I put in this fluid, after about 5 miles of driving I found myself grinning as my car moved through gears like it never had before. Even brand new my car never shifted as well, as smooth. This fluid honestly made my car - with a lot of miles on it now - drive better than it ever has, including when I drove it off the lot with the dealer plates on it. I can't say enough about how such a simple - easy - low cost - thing improved the drivability of my car. Everyone should put this in their manual gear boxes *get the right weight for your car* - just great. Mad I waited so long to do it. ----- ------ ----- for those interest in how to do this on an Altima - it is very easy as I said ------ ------ ----- Pull out your air intake - like you would to change your air filter - except remove the whole box, there is one Philips screw holding in the air box with the mass air flow sensor in it - it is located right next to your strut mount on the drivers side. Leave the mass air flow sensor hooked up and everything, you just need to move it out of the way a bit. Look down into your engine bay - about 4 inches to the left of your master cyclender you will see a 10 mm bolt holding down the fill hole for your MT fluid. Remove this 10 mm bolt - then just pull the fill hole cover off. Done with opening it, up top - a few mins. Now jack up the car, leave the tires on - see easier than an oil change - locate the drain plug right below the fill hole. this is a 10 mm Hex bolt. put a pan under it, remove the bolt, let the fluid drain. Put the bolt back in, remove the pan with the old fluid, lower the car. In total this takes just a few mins. Now . . . I just put a plain old funnel in the MT fluid fill hole. there is enough room you don't need to use a tube. Open the first bottle of fluid, put your thumb over the opening so you can put its opening into the funnel without spilling it. Remove your thumb from the bottle and let it go into the funnel, into your car. Open the second bottle - measure out 700 ml - pour that 700 Ml into the empty bottle you just put into your car. Now simply put your thumb over the bottle opening, so you can get it into the funnel without spilling, let it drain into your car. Replace the fill cap and bolt - put your air intake back in place - I changed my air filter while I was int here - and your done. Nothing to it. very easy. --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.hr/products/24084581-50505-mt-85-manual-transmission-75w85-gl-4-gear-oil](https://www.desertcart.hr/products/24084581-50505-mt-85-manual-transmission-75w85-gl-4-gear-oil) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-07-13*