REV-X E85 Gasoline Tester – 5 fl. oz.
When precision matters, the REV-X E85 Gasoline Tester delivers accurate, no-nonsense results every time. Designed for performance tuners, mechanics, and serious gearheads, this shatterproof 5-ounce tester features clearly marked 5% increments for quick, reliable ethanol readings. The large opening makes filling simple, while the durable, laminated label resists fading and wear — even in shop environments.
Perfect for anyone running E85 conversions or ethanol-blended fuels, this tester makes dialing in your tune or carb setup effortless. Know exactly what’s in your tank before you hit the throttle — because performance starts with precision.
$12.95
- Description
- Instructions
- Additional information
- Reviews (3)
- Q & A
Description
Key Benefits & Features
- Precision Markings Every 5% – Accurately measure ethanol content from E0 to E85 with clear, easy-to-read graduations at every 5% interval.
- Large 5 oz. Capacity – A generous five-fluid-ounce volume makes testing simple and effective, even with limited fuel samples.
- Wide-Mouth Design – The oversized opening allows easy pouring without spills, making it ideal for shop or track use.
- Shatterproof Construction – Crafted from durable, clear plastic, this tester stands up to repeated use and harsh work environments without cracking or clouding.
- Fade-Proof, Laminated Label – The high-quality printed label is laminated to resist fuel damage, moisture, and solvents, ensuring readability for years of service.
- Essential for E85 Conversions – Simplifies tuning carburetors and EFI systems by letting you confirm the exact ethanol percentage before calibrating your setup.
- Trusted by Professionals – Designed and tested for accuracy by REV-X, a leading name in high-performance fuel system innovation.
Why Test Your Fuel?
As ethanol-blended fuels become more common — especially in high-performance and E85 applications — knowing your true ethanol concentration is critical. Ethanol content can vary widely from pump to pump, directly affecting combustion, air-fuel ratios, and overall performance. The REV-X E85 Gasoline Tester ensures your tune is based on facts, not guesses.
Safety & Maintenance
Always handle and dispose of test fuel safely and responsibly. Since disposal regulations can vary by city, state, and region, be sure to follow all local, state, and federal guidelines when discarding your test samples.
For maximum protection and performance, treat your fuel after testing. Use REV-X E-Boost Alcohol Fuel Treatment when ethanol content is above 20%, or REV-X Adrenaline Gasoline Treatment for blends 20% and below. These products can prevent ethanol-related corrosion, boost engine efficiency, and keep your fuel system performing like new.
Watch How It’s Done:
Learn how to properly test your E85 gasoline in this detailed walkthrough video:
- Fill with water to the water fill line.
- Fill with the gasoline or alcohol to the E85 gas fill line.
- Reapply the cap and firmly tighten it to avoid any leaking liquid.
- Shake until contents are thoroughly blended.
- Rest on a flat surface and let the contents settle.
- Read the ethanol content by looking for the separation of gasoline and water.
Additional information
| Weight | 4 oz |
|---|---|
| Dimensions | 1.5 × 1.5 × 6 in |
| Brand | REV X |
| Manufacturer | Rev X Products, Inc. |
3 reviews for REV-X E85 Gasoline Tester – 5 fl. oz.
| 5 star | 66% | |
| 4 star | 33% | |
| 3 star | 0% | |
| 2 star | 0% | |
| 1 star | 0% |
Only logged in customers who have purchased this product may leave a review.
Carl (verified owner) –
Super easy to review and order products. Timely delivery and a quality product. Can’t ask for better service.
John (verified owner) –
Wish the opening to the bottle was larger and there was a bit more head room for filling
Chris Stone (verified owner) –
I’m sure the product is fine but I don’t have it yet.