EVIL ENERGY 5/16 Fuel Line Hose 10ft - High-Temp Fuel Injection Line

In this review the EVIL ENERGY 5/16 fuel line hose is evaluated for use in fuel injection systems and demanding automotive environments. The bottom line: this 10ft, SAE J30R9-rated hose is aimed at DIY mechanics and professional tuners who need a flexible, high-temperature fuel line that resists ethanol blends and holds up under pressure. The reviewer found it most compelling for applications needing a robust, 300psi working pressure hose with an FKM inner for chemical resistance and an aramid reinforcement for durability.

Key Features

• ID and Length: With a 5/16 in inner diameter and a full 10ft length, it covers common runs for fuel rails, filters, and pump hookups without frequent splicing.
• High Temperature Range: Rated from -40F to 275F (with intermittent use to 302F), it handles engine bay heat and short excursions into higher temps.
• Pressure Performance: The hose offers a 300psi working pressure and a 1200psi burst rating, giving a safe margin for injection and pump pressures.
• Fuel Compatibility: The FKM inner compound and ECO cover make it compatible with ethanol blends including E85, biodiesel and diesel, reducing chemical degradation risk.
• SAE J30R9 Standard: Built to meet and exceed SAE J30R9, it is suitable for fuel injection systems and compatible with 30R7 and 30R6 applications across automotive uses.
• Flexibility and Reinforcement: Aramid fiber reinforcement and a 2.52 in minimum bend radius provide a balance of flexibility and strength for tight routing.

Who It's For

The EVIL ENERGY 5/16 hose is best for car enthusiasts performing LS swaps, engine bay upgrades, or replacing lines on modern fuel-injected engines that use ethanol blends. It fits builders who prioritize chemical resistance, a high working pressure rating, and a long continuous length to reduce joints.

Those who should look elsewhere include users who need a precisely tight fit on nonstandard 5/16 in barb fittings where reports note occasional loose fit, or users needing pre-assembled hose ends and fittings rather than raw hose stock.

Pros & Cons

Pros

• Durable construction with FKM inner and aramid reinforcement gives strong chemical and mechanical resistance.
• Wide temperature tolerance and high burst pressure suit demanding engine bay environments.
• 10ft length and 5/16 in ID make it versatile for fuel systems, filters, pumps, and LS swaps.
• Meets SAE J30R9 and works with multiple fuel types including E85 and biodiesel.

Cons

• Some users report a mixed fit on 5/16 in barbed fittings, so testing on specific fittings is recommended.

Specifications

Inner Diameter	5/16 in (8mm) 0.4mm
Outer Diameter	0.55 in (14mm) 0.5mm
Length	10 ft
Working Pressure	300 psi
Burst Pressure	1200 psi
Temperature Range	-40F to 275F (intermittent to 302F)
Construction	FKM inner, ECO cover, aramid fiber reinforcement

Our Verdict

The EVIL ENERGY 5/16 fuel line is a practical choice for hobbyists and pros who need a chemically resistant, high-pressure hose for fuel injection, LS swaps, and fuel system plumbing. It delivers durable materials, wide temperature tolerance, and industry-standard ratings at a reasonable price, though buyers should verify fit on their specific barb fittings before final installation.

Frequently Asked Questions

Is this hose compatible with ethanol blends like E85?
Yes. The FKM inner and ECO cover are compatible with ethanol blends, E85, E10, E15, biodiesel, and diesel.

Will it work for fuel injection systems?
Yes. The hose meets and exceeds SAE J30R9 and is designed for fuel injection, fuel tanks, pumps, and related fuel system uses.

Can it handle engine bay heat?
Yes. It is rated -40F to 275F with intermittent use to 302F, suitable for typical engine bay conditions.