Opti-Lube XPD All-Season Diesel Fuel Additive - Gallon - Improves MPG

In this review of Opti-Lube XPD All-Season Diesel Fuel Additive the bottom line is straightforward: this gallon-size concentrate is aimed at diesel truck owners, farmers and equipment operators who want better lubricity, cleaner injectors and modest fuel economy gains without complicated dosing. The reviewer found it useful for long-term diesel care because it increases lubricity for ULSD, helps prevent injector deposits and includes anti-gel protection down to -10 F, making it a practical, year-round treatment that treats very large volumes at a low per-gallon cost.

Key Features

• Designed for lubricity: Improves the lubricating properties of ultra-low-sulfur diesel so fuel system wear is reduced and moving parts stay protected.
• Fuel economy improvement: Formulated to enhance miles per gallon in varied conditions, giving modest but noticeable fuel savings over time.
• Injector cleaning: Cleans existing injector residue and helps prevent future build-up, which supports smoother engine operation and reduced emissions.
• All-season performance: Contains anti-gel protection to keep fuel flowing down to -10 F and acts as a demulsifier to separate water from diesel.
• Rust and corrosion prevention: Adds protection against rust in the fuel system, helping preserve pumps and injectors during storage and use.
• Economical treatment rate: One gallon treats up to 512 gallons per dose rate listed, making the product cost-effective for high-mileage users.

Who It's For

This product is best for owners of diesel pickup trucks, farm tractors, construction machines and fleet vehicles who want a single, year-round additive that addresses lubricity, injector cleanliness and cold-weather flow. People who run ultra-low-sulfur diesel fuel and are concerned about fuel pump and injector wear will see the most value.

It is less appropriate for drivers looking for dramatic, immediate horsepower gains or those who need additive solutions tailored to specific manufacturer warranty programs; anyone requiring a specialty cetane booster beyond the modest cetane improvement claims should compare purpose-built products.

Pros & Cons

Pros

• Improves lubricity in ULSD, which helps reduce fuel system wear and noise.
• Helps clean injectors and prevents future deposits, supporting smoother engine performance.
• Provides anti-gel protection to -10 F and separates water from diesel as a demulsifier.
• Cost-effective treatment rate, making it inexpensive per treated gallon for large tanks and fleets.

Cons

• Performance gains such as fuel mileage improvements are described as modest by customers, not dramatic.
• Not a substitute for specialized warranty-specific or high-cetane-only products for some applications.

Specifications

Product	Opti-Lube XPD All-Season Diesel Fuel Additive - Gallon
Treatment volume per gallon	Treats up to 512 gallons (4-gallon pack treats 2048 gallons)
Primary benefits	Increases lubricity, cleans injectors, improves fuel economy
Cold-weather protection	Anti-gel to -10 F
Storage life effect	More than doubles standard diesel storage life
Additional action	Demulsifier (separates water) and rust/corrosion prevention

Our Verdict

Opti-Lube XPD is a practical, value-minded diesel fuel additive for anyone who wants better lubricity, cleaner injectors and modest MPG improvements across seasons. Its anti-gel and demulsifier properties make it especially good for seasonal storage and cold climates, and the treatment rate gives low per-gallon cost for trucks, farm gear and construction equipment.

Frequently Asked Questions

Will this improve my fuel economy?
It can produce modest fuel mileage gains over time by improving combustion efficiency and injector performance, though results vary by vehicle and driving conditions.

Is it safe for emissions systems?
The formula is compatible with vehicle emissions systems and is designed to reduce deposits and emissions while cleaning injectors.

How cold can I run diesel with this?
Contains anti-gel protection rated to keep fuel flowing down to -10 F and also helps separate water from diesel for better cold-weather reliability.