STA-BIL Fuel Stabiliser is trusted by vehicle owners, boaters, and equipment operators worldwide for keeping fuel fresh and engines protected. But one common question users ask is: what is the shelf life of STA-BIL fuel stabiliser? Knowing how long it lasts ensures you get the best performance and protection every time you use it.
Understanding STA-BIL Fuel Stabiliser Shelf Life
In its original, unopened container, STA-BIL Fuel Stabiliser has a shelf life of about 2 years from the date of manufacture. After opening, it remains effective for around 12 to 24 months, depending on how it’s stored. Over time, exposure to air, temperature fluctuations, and sunlight can reduce its effectiveness. To maximize longevity, store the product tightly sealed in a cool, dry location, away from direct heat or sunlight.
How to Tell If STA-BIL Is Still Good
Checking your stabiliser is easy. Fresh STA-BIL fuel additive is typically red (or blue for marine formulas). If the liquid appears darker or has turned brown, it may have degraded and should be replaced. Using expired stabilizer won’t harm your engine, but it won’t effectively protect or preserve your fuel either.
Using STA-BIL Correctly for Maximum Protection
For best results, always add STA-BIL Fuel Stabiliser to fresh fuel. This prevents oxidation and stops gum or varnish buildup that clogs carburetors and injectors. When stored properly, treated fuel stays fresh for up to 24 months—making it ideal for vehicles, lawnmowers, generators, and boats during storage seasons.
Why Shelf Life Matters
Understanding how long STA-BIL lasts helps ensure your fuel system gets the full benefit of its protective formula. Using fresh stabilizer guarantees that your fuel remains clean, moisture-free, and ready for use even after long periods of inactivity. Regularly replacing your bottle of STA-BIL® Fuel Stabiliser every two years ensures top performance and peace of mind.
Diesel Fuel Additive Guide
Whether you’re storing a car, boat, or small engine, STA-BIL® keeps your fuel fresh and your engines ready to start—season after season.
