Mdr Fuel Additives & Storage Kits
MDR Fuel Additives & Storage Kits: Marine-Grade Protection Since 1966
MDR (Marine Development & Research) has been engineering fuel additives specifically for the demands of the marine environment since 1966. Where a generic automotive fuel product might cover the basics, MDR’s lineup is designed around the unique challenges boaters face: seasonal lay-ups, ethanol-blended fuels, saltwater condensation, and the harsh realities of engines that sit idle for months at a time. Their fuel additives and storage kits reflect decades of marine-focused chemistry and real-world testing.
Flagship Product: Stor-N-Start® Fuel Stabilizer
The centerpiece of MDR’s fuel additive lineup is the renowned Stor-N-Start® — available in both gasoline and diesel formulas. This stabilizer is built to keep fuel refinery-fresh and prevent octane loss through extended storage periods such as winter lay-up. The formula contains antioxidants, de-gummers, inhibitors, and metal deactivators, and notably contains no alcohol or methanol. Stor-N-Start is also the only fuel stabilizer to have earned the "performance tested and verified" seal from the Marine Testing Institute, making it a standout in a crowded field. The U.S. Coast Guard’s bulletin on winterizing recreational boats recommends keeping installed tanks filled and treated with a fuel stabilizer — exactly what Stor-N-Start is engineered to deliver.
Water in the Tank? MDR Has a Solution
One of the most persistent threats to marine engines is water contamination in the fuel system — whether from condensation, ethanol phase separation, or fuel handling. MDR addresses this directly with two dedicated products:
- Gas Zorb — Absorbs water in gasoline fuel tanks and allows it to burn harmlessly through the engine. Contains no methanol or alcohol, making it safe for use in modern fuel systems.
- Diesel Zorb — The diesel-specific counterpart, offering the same water-absorption technology for diesel-powered vessels.
MDR even offers a water-detection tool that uses an applicator brush on the dipstick and turns red to show the exact level of water present in the fuel tank — a proactive diagnostic step before problems become serious.
More From MDR’s Fuel Treatment Lineup
Beyond stabilizers and water removers, MDR rounds out its fuel category with several other targeted solutions:
- E-Zorb — Formulated specifically for ethanol-blended gasoline, helping counteract the moisture-attracting properties of E10 and similar fuels.
- Gasoline Start Fresh — A spring treatment designed to wake up fuel after winter storage and condition the fuel system for the new season.
- Diesel Fuel Conditioner & Cetane Booster — Raises the cetane rating for smoother combustion, faster warm-ups at low temperatures, and cleaner injectors with reduced smoke and diesel knock.
- Crankcase Stor-N-Start (MDR-600) — An anti-rust motor oil additive designed for the crankcase during winter storage, providing corrosion protection from the inside out.
- ReLead — A lead-substitute valve seat lubricant for older 4-cycle engines originally designed for leaded gasoline, preventing metal-to-metal wear at high temperatures.
Why MDR Stands Apart in Marine Fuel Care
MDR’s approach to fuel additives is shaped by a singular focus: the marine environment. Their formulas are alcohol-free and methanol-free where it matters most, third-party verified by the Marine Testing Institute, and available in multiple sizes to suit everything from a small outboard to a large twin-diesel cruiser. For boaters who take seasonal storage and engine longevity seriously, MDR’s fuel additive and storage kit lineup represents a trusted, purpose-built solution with more than half a century of marine chemistry behind it.