RevX Ethanol Super Tester | E85 Fuel Content Tester for Performance Vehicles

The RevX Ethanol Super Tester is an essential tool for enthusiasts running E85, flex fuel, or ethanol-blended fuels in their high-performance vehicles. Designed to provide quick and accurate ethanol content readings, this tester allows drivers to verify fuel quality before filling up, helping eliminate guesswork and ensuring their engine receives the proper fuel blend for maximum performance. Whether you’re operating a flex fuel-equipped Gen 3 HEMI, a custom-tuned Hellcat, a Trackhawk, or another ethanol-capable platform, knowing the exact ethanol percentage in your fuel can make a significant difference in horsepower, drivability, and engine safety. Compact, easy to use, and highly repeatable, the RevX Ethanol Super Tester is a valuable addition to any enthusiast’s toolbox.

E85 has become increasingly popular among performance enthusiasts because of its high octane rating, improved knock resistance, and ability to support substantially higher horsepower levels when properly tuned. However, one of the biggest challenges with ethanol-based fuels is inconsistency. Fuel labeled as E85 can vary widely in ethanol concentration depending on the season, region, and supplier, often ranging anywhere from E50 to E85 or higher. Running fuel with lower-than-expected ethanol content can reduce performance and may require tuning adjustments, especially in aggressively calibrated forced induction applications. The RevX Ethanol Super Tester provides a simple and effective way to verify ethanol percentages before fueling, helping owners maintain confidence in their tune and fuel system setup.

Operation is straightforward and typically takes just a few minutes. Users add water to the indicated level, fill the tester with a fuel sample, shake the container, and allow the mixture to separate. The calibrated markings clearly indicate the ethanol percentage, providing immediate results without requiring batteries, electronic sensors, or complicated calibration procedures. This simplicity makes the tester ideal for daily drivers, weekend racers, and professional tuners who need dependable fuel content measurements at the track, in the garage, or while traveling.

For Gen 3 HEMI owners utilizing flex fuel kits, larger injectors, upgraded fuel systems, or custom tuning packages, monitoring ethanol content is one of the easiest ways to ensure consistent vehicle performance. Testing fuel before every fill-up can help maximize horsepower gains, maintain proper air-fuel ratios, and reduce the likelihood of encountering poor-quality fuel that could negatively affect drivability or engine reliability. The RevX Ethanol Super Tester is particularly useful for vehicles operating near the limits of their fuel systems, where even small changes in ethanol concentration may influence tuning requirements.

Whether you’re chasing personal bests at the drag strip, fine-tuning a street car, or simply seeking peace of mind at the pump, the RevX Ethanol Super Tester offers an affordable and reliable solution for monitoring ethanol content. Be sure to browse our Flex Fuel Components & Fuel System Upgrades category for additional products, including flex fuel kits, injectors, pumps, tuning solutions, and ethanol-compatible accessories designed to support your next HEMI build.

Specifications & Features

• Manufacturer: RevX Oil
• Product Name: Ethanol Super Tester
• Product Type: Ethanol Fuel Content Tester
• Material: Chemical Resistant Plastic
• Color: Clear with Graduated Measurement Markings
• Finish: Transparent
• Designed to Measure Ethanol Percentage in Fuel
• Suitable for E85, E70, E60, E50, and Flex Fuel Blends
• Fast and Accurate Testing Method
• No Batteries Required
• No Electronic Components
• Easy-to-Read Graduated Scale
• Reusable Design
• Compact and Portable
• Lightweight Construction
• Ideal for Trackside Use
• Excellent for Flex Fuel Vehicles
• Supports Consistent Tuning Results
• Helps Verify Fuel Quality
• Helps Maximize Engine Performance
• Helps Protect Against Poor Fuel Blends
• Vehicle Compatibility: Universal
• Year Compatibility: Universal
• Weight: Approximately 0.25 lbs.
• Dimensions: Approximately 6–8 inches tall
• Installation Required: No
• Intended Use: Fuel Testing, Performance Tuning, Drag Racing, Street Applications
• Professional Installation Not Required
• Quantity: Sold Individually
• Recommended for Supercharged and Ethanol-Tuned Applications