Stop Guessing What's Actually in Your E85
Pump ethanol content swings from tank to tank and season to season. The Spool Performance Handheld Ethanol Content Analyzer tells you exactly what you're running — in seconds, right from your phone.
Why Ethanol Content Matters
"E85" at the pump is rarely a true 85% ethanol. Depending on region, blend, and season it can land anywhere from E60 to E85 — and that difference changes your air/fuel ratio, timing headroom, and power. If you're running a flex-fuel tune or mixing your own blend, guessing the ethanol content is guessing with your engine.
The Spool analyzer removes the guesswork. Sample your fuel, get an exact ethanol percentage, and tune or blend with confidence every single fill-up.
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Live Data on Your Phone
The handheld unit pairs with the free Spool Ethanol Analyzer app for iOS and Android. Drip a small fuel sample into the device and your ethanol content displays in real time on your phone — clean, instant, and easy to read.
No technical expertise required. Just drip, check, and go. It's compact enough to keep in the glovebox or your track bag so you always know what's in the tank.
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🧪 How It Works
Take a small sample of the fuel you want to test, add it to the handheld analyzer, and read the ethanol percentage live on the Spool app. That's it — instant, repeatable readings so you can verify every batch of E85 or your own custom blend before it goes in the tank.
📦 Assembled in Texas — Please Allow ~1 Week
Each unit is carefully assembled by the Spool Performance team in Texas. Please allow up to one week for assembly before shipment. Universal fitment — works with any vehicle or fuel source you want to test.
FAQ
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What does it actually measure?
The ethanol content (percentage) of a fuel sample — so you know whether your "E85" is really E70, E85, or somewhere in between.
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Do I need the app?
Yes — readings display in real time on the free Spool Ethanol Analyzer app, available for both iOS and Android.
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Is it hard to use?
No. Drip a small fuel sample into the handheld unit and read the result on your phone. No technical expertise required.
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What vehicles does it work with?
It's universal — it analyzes the fuel itself, so it works for any vehicle, mix, or fuel source you want to test.
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Why do I need this if I already run a flex tune?
Flex tunes rely on accurate ethanol content. Verifying your actual blend helps your tune make correct decisions and protects against inconsistent pump E85.
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How fast do I get it?
Each analyzer is assembled to order in Texas — please allow up to about one week for assembly before it ships.
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