Which Opti-Lube Diesel Fuel Additive Should I Use?

Choosing the right diesel fuel additive depends on your main concern. Some customers want one all-around additive. Others are focused on maximum lubricity, stronger cetane, cold-weather protection, or a one-time fuel system cleaning treatment.

Quick Product Guide

XPD All-Season

XPD All-Season is our most popular diesel fuel additive because it covers the widest range of needs in one product. It supports lubricity, injector cleanliness, water separation, corrosion protection, fuel stability, cetane improvement, and cold-weather performance.

XL Extreme Lubricant

XL Extreme Lubricant is the best choice when maximum lubricity is the main goal. It is popular in warm climates, older diesel engines, equipment, and applications where fuel system wear protection is the top priority.

Summer+

Summer+ is a warm-weather formula focused on lubricity, cetane, detergency, and performance. It is a good option when anti-gel protection is not needed.

Boost!

Boost! is the best option when the main goal is cetane improvement. Higher cetane can help with cold starts, smoother combustion, reduced ignition delay, and overall drivability.

Winter

Winter is designed for stronger cold-weather anti-gel protection. It should be added before fuel reaches its cloud point or begins to gel.

Single Clean and Gel Melt

Single Clean is a stronger one-tank cleaning treatment for injector deposits, smoke, rough running, or fuel system cleanliness concerns. Gel Melt is an emergency product for diesel fuel that is already gelled.

Need help choosing? Start with Opti-Lube diesel fuel additives or review our FAQ for dosing, storage, and compatibility questions.

Q&A: Can I Mix Multiple Opti-Lube Diesel Additives?

In short: yes, Opti-Lube diesel additives can generally be mixed. The main thing to remember is that each product is designed for a purpose, so mixing products is not always necessary.

Common Combinations

XL Extreme Lubricant and Boost! can make sense when a customer wants strong lubricity and a stronger cetane increase. XPD All-Season and Winter can also be used together when a customer wants XPD’s year-round benefits plus stronger cold-weather anti-gel protection.

When Mixing May Not Be Needed

Mixing XL and XPD All-Season is usually not necessary because both provide strong lubricity benefits. Summer+ may also provide the balance some customers are trying to get by mixing XL and Boost!.

Avoid Overdoing It

Using a little more than the recommended amount is usually not a concern, but significantly overdosing generally does not provide extra benefit and may not be cost-effective. Follow the directions on the bottle or product page for best results.

Need help choosing? Start with Opti-Lube diesel fuel additives or review our FAQ for dosing, storage, and compatibility questions.

What Is Cetane and Why Does It Matter?

Cetane relates to how readily diesel fuel ignites during combustion. In simple terms, a higher cetane number usually means the fuel ignites more easily and with less delay after injection.

Why Cetane Matters

A higher cetane number can help improve cold starts, reduce ignition delay, smooth engine operation, reduce diesel knock, and support more efficient combustion. The benefit you notice depends on the fuel, engine, temperature, and operating conditions.

Does Higher Cetane Improve MPG?

Some customers report improved fuel economy when cetane is improved, but results vary. Fuel quality, vehicle condition, load, driving habits, idle time, weather, and route can all affect mileage.

Which Opti-Lube Product Is Best for Cetane?

Boost! is the best choice when maximum cetane improvement is the main goal. Summer+ and XPD All-Season also provide cetane benefits as part of a broader additive package.

Need help choosing? Start with Opti-Lube diesel fuel additives or review our FAQ for dosing, storage, and compatibility questions.

What’s the Difference Between Opti-Lube Diesel Fuel Additives?

One of the most common questions we get is: what is the difference between your diesel fuel additives? The short answer is that each product is designed for a different need.

Quick Product Guide

XPD All-Season

XPD All-Season is our most popular diesel fuel additive because it covers the widest range of needs in one product, including lubricity, cleaning, water separation, corrosion protection, stability, cetane improvement, and cold-weather support.

XL Extreme Lubricant

XL Extreme Lubricant is the best choice when maximum lubricity is the main goal and anti-gel protection is not needed.

Summer+ and Boost!

Summer+ is a warm-weather formula with lubricity, cetane, detergency, and performance benefits. Boost! is the best choice when the main goal is maximum cetane improvement.

Winter, Single Clean, and Gel Melt

Winter is for stronger preventative cold-weather anti-gel protection. Single Clean is for stronger one-tank cleaning. Gel Melt is for emergency use when diesel fuel is already gelled.

Need help choosing? Start with Opti-Lube diesel fuel additives or review our FAQ for dosing, storage, and compatibility questions.