Opti-Lube XPD All-Season Diesel Fuel Additive 8oz Long Neck - 12 Pack

Our review of the Opti-Lube XPD All-Season Diesel Fuel Additive finds it most useful for truck owners, fleet operators, and anyone who stores or runs diesel equipment year round; the single biggest reason to buy is its combined lubrication and performance benefits that improve injector cleanliness and fuel economy across seasons. The 8oz long neck bottles are convenient for treating up to 32 gallons of diesel each, and the formula promises to boost cetane, separate water from fuel, and help prevent rust and corrosion, making it a practical maintenance item rather than a one-off tune-up product.

Key Features

• Increases lubricity: Helps restore and enhance the lubricating properties of ultra-low-sulfur diesel so fuel system wear is reduced.
• Improves fuel economy: The formula is reported to enhance fuel mileage year round, which can lower operating costs for trucks and equipment.
• Cleans injectors: Acts to remove deposits and prevent future build-up in injectors, supporting smoother engine operation and lower emissions.
• Enhances performance: Boosts cetane by up to 3 points and supports performance in summer and winter conditions for more reliable starts and power delivery.
• Water separation and storage life: Functions as a demulsifier to separate water from diesel and more than doubles standard diesel storage life for seasonal equipment.
• Convenient packaging: Comes in 8oz long neck bottles where each bottle treats up to 32 gallons for easy dosing and handling.

Who It's For

This product is aimed at professional truckers, owner-operators, and rural users who run farm or construction equipment on diesel and want to reduce injector wear and improve mileage without mechanical changes. The long neck bottles and per-bottle treatment volume make it practical for on-the-road top-offs or scheduled maintenance.

Those who should look elsewhere include owners seeking multi-purpose oil additives for gasoline engines or buyers who need single-use bulk concentrate for very large commercial tanks; this format is optimized for vehicle and small equipment use rather than industrial bulk dosing.

Pros & Cons

Pros

• Improves lubricity to protect fuel injectors and reduce wear.
• May increase fuel economy and boost cetane up to 3 points for better performance.
• Cleans injectors and helps prevent future deposit build-up, aiding emissions compliance.
• Long neck 8oz bottles are easy to use and each treats up to 32 gallons.

Cons

• Not intended for gasoline engines, so its benefits are limited to diesel applications.
• Effectiveness will depend on regular use and correct dosing; results can vary by vehicle and fuel condition.

Specifications

Brand	Opti-Lube
Product	XPD All-Season Diesel Fuel Additive
Bottle size	8oz long neck
Pack quantity	12 per case
Treatment volume	Each bottle treats up to 32 gallons of diesel
Key functions	Lubricity boost, injector cleaning, cetane boost, demulsifier
Suitable for	Trucks, farm and construction equipment, diesel storage

Our Verdict

The Opti-Lube XPD All-Season Diesel Fuel Additive is a sensible purchase for diesel vehicle owners who want an easy-to-use preventive maintenance product that improves lubricity, supports injector cleanliness, and can raise cetane modestly. For those who run trucks, tractors, or construction machines and want better fuel economy and longer fuel storage life, this 12-pack of 8oz bottles offers convenient dosing and good value compared with replacing worn components prematurely.

Frequently Asked Questions

How much fuel does one 8oz bottle treat?
Each 8oz long neck bottle treats up to 32 gallons of diesel when used according to the bottle directions.

Will this work in cold weather?
Yes, the XPD formula includes anti-gel properties and functions as a demulsifier to help separate water from fuel, supporting year-round performance.

Is it safe for emissions systems?
Yes, the additive is described as compatible with vehicle emissions systems while helping to reduce deposits and emissions.