VP Madditive delivers 3-year fuel stabilization — longer than most competitors manage. The formula handles any gasoline-powered 2-cycle or 4-cycle engine, compatible with pump gasoline containing up to 15% ethanol (E10, E15). An 8-ounce bottle treats up to 80 gallons, making the math work for contractors storing seasonal equipment through Montana winters.
The 8-ounce bottle includes Ethanol Shield/Armor technology that eliminates phase separation and corrosion problems. Phase separation happens when ethanol absorbs water from the air and drops out of the fuel blend. That water-ethanol mix sinks to the tank bottom, creating a corrosive layer that eats fuel system components. Montana’s temperature swings accelerate this process.
Technical Specifications and Treatment Ratios
VP Madditive operates across a wide temperature range with a boiling point of 275°F-410°F and a viscosity of 2.03 cSt. The formula maintains a specific gravity of 0.75 and runs unscented. Part number 2815, UPC 651348028156.
Treatment ratios depend on ethanol content and storage duration:
| Application | Dosage | Coverage |
|---|---|---|
| General use (>10% ethanol or unknown) | 1 oz per gallon | 8 gallons per bottle |
| Storage up to 2 years (<5% ethanol) | 1 oz per 10 gallons | 80 gallons per bottle |
| Storage up to 3 years (>10% ethanol) | 1 oz per 5 gallons | 40 gallons per bottle |
Add stabilizer to the fuel tank first, then pump in fuel to ensure mixing. Run the engine for 5-10 minutes to circulate. This pulls treated fuel through the entire system, protecting carburetors, injectors, and fuel lines.
Real-World Performance and Competition
VP Madditive competes with STA-BIL Storage, Seafoam, and Star Tron, offering a longer stabilization period (3 years vs 1-2 years for some competitors). Independent testing like Project Farm frequently ranks it as a top performer for corrosion prevention.
Review scores vary by retailer: 5.0 stars at Ace Hardware and Lowe’s (5 reviews each), 3.9 at JEGS and Generator Mart (9 reviews each), 3.0 at Summit Racing (2 reviews). The mixed scores at specialty retailers suggest performance varies with application — works great for storage, less impressive as a performance additive.
The formula’s oxygen sensor safe certification matters for modern equipment with emissions controls. Many older stabilizers damage O2 sensors, triggering check engine lights or lean-running conditions.
Montana-Specific Applications
VP Madditive targets small engine equipment (lawn mowers, generators, snow blowers), powersports (ATVs, UTVs, motorcycles, dirt bikes), and marine gasoline engines. For Montana contractors, that covers:
- Snow removal equipment sitting idle May through October
- Construction equipment stored during winter shutdowns
- Generators for remote jobsite power
- Ranch equipment with intermittent use patterns
The 3-year shelf life stabilization handles Montana’s feast-or-famine construction seasons. Pour it in October, equipment starts in April. No carburetor rebuilds, no fuel system cleanouts, no spring surprises.
Not for use in diesel engines. Diesel requires different chemistry — look for diesel-specific stabilizers for equipment with compression ignition engines.
FAQ
How much VP Madditive do I need for my 5-gallon gas can? For fuel with more than 10% ethanol or unknown ethanol content, use 1 oz per gallon. That’s 5 ounces for a 5-gallon can. For long-term storage (up to 3 years) with high-ethanol fuel, use 1 oz per 5 gallons — just 1 ounce treats the whole can.
Does VP Madditive actually prevent ethanol damage? Yes. The Ethanol Shield/Armor technology specifically eliminates phase separation and corrosion problems. Independent testing frequently ranks it as a top performer for corrosion prevention.
What’s the shelf life of the stabilizer itself? VP Madditive provides up to 3 years shelf life stabilization for treated fuel. The stabilizer bottle itself has no stated expiration — store in a cool, dry place.
Can I use this in my motorcycle? Yes. VP Madditive works in any gasoline-powered 2-cycle or 4-cycle engine, including motorcycles. It’s oxygen sensor safe, so modern fuel-injected bikes are covered.
How does VP Madditive compare to STA-BIL? VP Madditive offers longer stabilization (3 years vs 1-2 years for some competitors) and includes specific ethanol protection. Both prevent fuel degradation, but VP’s extended protection period gives it an edge for true long-term storage.
Ready to Get Started?
Our tools specialists can help you find the right VP Racing products for your project.
