--- product_id: 4272642 title: "Royal Purple 11687 HPM Gear Lube 80W90 High Performance Synthetic Marine Gear Lubricant - 1 qt." brand: "royal purple" price: "€ 4.05" currency: EUR in_stock: false reviews_count: 8 url: https://www.desertcart.hr/products/4272642-royal-purple-11687-hpm-gear-lube-80w90-high-performance-synthetic store_origin: HR region: Croatia --- # Water separation Heat reduction High film strength Royal Purple 11687 HPM Gear Lube 80W90 High Performance Synthetic Marine Gear Lubricant - 1 qt. **Brand:** royal purple **Price:** € 4.05 **Availability:** ❌ Out of Stock ## Summary > ⚓ Gear Up for Adventure with Royal Purple! ## Quick Answers - **What is this?** Royal Purple 11687 HPM Gear Lube 80W90 High Performance Synthetic Marine Gear Lubricant - 1 qt. by royal purple - **How much does it cost?** € 4.05 with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/4272642-royal-purple-11687-hpm-gear-lube-80w90-high-performance-synthetic) ## Best For - royal purple enthusiasts ## Why This Product - Trusted royal purple brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Corrosion Fighter:** Maximize water separation to prevent corrosion and extend equipment life. - • **Advanced Technology:** Utilizes proprietary Synerlec additive technology for superior performance. - • **Compact Convenience:** Lightweight design (1 lb) for easy handling and application. - • **Unmatched Durability:** Experience exceptional film strength that dramatically reduces gear wear. - • **Fuel Efficiency Booster:** Enhance your fuel efficiency while protecting your marine gear. ## Overview Royal Purple 11687 HPM Gear Lube 80W90 is a high-performance synthetic marine gear lubricant designed to extend the life of your lower unit. With exceptional film strength, it reduces gear wear and heat, improves fuel efficiency, and provides maximum water separation to prevent corrosion. This 1-quart lubricant is engineered with proprietary Synerlec additive technology, making it a top choice for marine enthusiasts. ## Description HPM High Performance Marine Gear Lube is formulated to maximize performance and provide superior protection for marine lower gear units. It is recommended for equipment requiring an API Service GL-5 or GL-4 fluid. The cushioning molecules in HPM Gear Lube absorb gear impact to prevent fatigue and minimize wear. HPM gear lube also significantly reduces friction, which lowers gear unit temperatures, extends equipment life and improves fuel efficiency. HPM gear lube uses Royal Purple's advanced, proprietary Synerlec additive technology enabling HPM to exceed the harsh demands of the marine applications. ## Features - Exceptionally high film strength for dramatic reductions in gear wear and reduced heat to extend the life of your lower unit - Improves fuel efficiency - Provides maximum water separation and prevents corrosion - Proprietary Synerlec additive technology ## Technical Specifications | Specification | Value | |---------------|-------| | Manufacturer | Royal Purple | | Brand | Royal Purple | | Model | 11687 | | Item Weight | 1 pounds | | Product Dimensions | 4 x 2 x 8.75 inches | | Item model number | 11687 | | Manufacturer Part Number | 11687 | | OEM Part Number | 11687 | ## Images ![Royal Purple 11687 HPM Gear Lube 80W90 High Performance Synthetic Marine Gear Lubricant - 1 qt. - Image 1](https://m.media-amazon.com/images/I/71i7QkcF9NL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars Royal Purple HPM 80w-90 Gear Lube #11687 *by D***H on Reviewed in the United States on January 24, 2015* I have a 1994 GMC K2500, I had an ASE certified shop install a new crate 454 (7.4lt.) 22,000 miles ago, the rear axle has also been rebuilt- 4:10 gear ratio, the front axle has also been rebuilt- the NV4500 transmission is also new, I have used this gear lube in all areas that require GL 4-5 , it has preformed top notch, as with all Royal Purple products, they are a bit pricey, but so is a new truck- if you want the very best in all lubricants- Go with Royal Purple, this 80w-90 is a grade above the 75w-90 with the additives that make it favorable for marine use- Thanks Amazon and all those who take the time to review the products we need, and Thanks Royal Purple for the very best in lubricants that help make our vehicles last ### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars 1989 Evinrude 110 *by S***6 on Reviewed in the United States on April 30, 2015* Seems to work well. It stopped clunking hard when engaging the drive. Keeps the foot from getting as hot. You could tell the difference after a long run and feeling the foot after jumping in for a swim. Only one season of using, so no long term opinion. I would buy again. Seems sticky though like chainsaw chain oil. Hopefully that is a good thing. Time will tell.UPDATE: I have just changed the oil after about 35 hours of running. Looked like new oil. The magnetic plugs only had a slight gray tint of material stuck to them. I replaced with Royal Purple again and changed the rubber washers to the plugs. This is my new gear oil. ### ⭐⭐⭐⭐ 4.0 out of 5 stars Round Bottle Not Compatible with Lower Unit Pump *by T***D on Reviewed in the United States on April 29, 2015* Good product, but not compatible with standard marine lower unit fill pump. Had to be transferred to a typical one quart oil bottle. It appears that the current illustration of this product shows it in a typical one quart oil bottle. --- ## 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/4272642-royal-purple-11687-hpm-gear-lube-80w90-high-performance-synthetic](https://www.desertcart.hr/products/4272642-royal-purple-11687-hpm-gear-lube-80w90-high-performance-synthetic) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-07-07*