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.

Tired of Measuring Diesel Additive for Every Tank?

Measuring diesel additive every time you fill up does not have to be complicated. The key is to know your tank size, understand the treatment rate, and use a container or dosing method that makes the amount easy to repeat.

Use the Right Treatment Rate

Treatment rates vary by product, so follow the directions on the bottle or product page. For example, XPD All-Season is commonly used at 1/4 oz per gallon of diesel fuel.

Make Dosing Easier

• Keep a dedicated measuring bottle in the vehicle.
• Pre-measure common amounts for your usual fill-up size.
• Add the product before or during fueling when possible.
• Use the same routine each time to avoid underdosing or overdosing.

What If You Add a Little Too Much?

A small amount over the recommended dose is usually not a concern. However, significantly overdosing generally does not provide extra benefit and is usually not cost-effective.

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