Cold Flow Diesel Additives for Fleets | Prevent Gelling & Winter Downtime
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Keep Your Fleet

Running

  in even the HARSHEST
Winter Conditions

Prevent Fuel Gelling   |   Maintain Flow   |   Reduce Winter Downtime

OPT CFI logo

Cold Weather Diesel Fuel Additive for Fleets

When temperatures fall, rely on the same proven performance fleet managers trust year-round.
Our OPT Winter Formulation extends the power of OPT-AD, our flagship all-season additive, with advanced Cold Flow Improver (OPT-CFI) technology engineered for today’s ultra-low sulfur diesel, biodiesel, and renewable blends.

Built with advanced polymers and proprietary wax anti-settling chemistry, this robust winter blend defends your fuel from gelling, filter plugging, and cold-weather power loss, while preserving all the performance benefits you count on throughout the year.

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The Hidden Costs of Winter Fuel Gelling

Every cold-weather breakdown costs you time, money, and reputation. Without proper cold-flow protection, diesel fuel can thicken and block flow to the engine, especially in northern and high-altitude climates.

Our OPT-Cold Flow Improver (CFI) additive offers the following benefits:

Reducing CFPP (Cold Filter Plugging Point) by up to 25°F or more*

Preventing fuel gelling and wax crystallization

Keeping filters clean and improving fuel flow

Eliminating frozen fuel lines and injector strain

Decreasing emergency service calls

Increasing driver uptime

*Performance may vary by fuel type and blend.

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Beyond Fighting Gelling: Total System Protection

Our OPT Winter Formulation isn’t just another anti-gel;  it’s a comprehensive fuel optimization system that includes all the benefits of our proven OPT-AD platform: 

Reducing regens & manual regens 

Maximizing fuel efficiency,  horsepower & responsiveness

Extending filter change intervals

Preventing corrosion & water damage

Lowering emissions & staying compliant

Enhancing lubricity & injector cleanliness

Stabilizing fuel for long-term storage

Ensuring cleaner combustion & reduced deposits

Available in Packaging for Tanks of Any Size:

OPT CFI 5-gallon pail.

5-gallon
pails

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OPT CFI 2.5-gallon jug.

2.5-gallon jugs

Cases of (2)

OPT CFI 55-gallon drum.

55-gallon
drums

OPT CFI 330-gallon tote.

275 & 330-gallon totes

>> Bulk delivery available

Hands-On Fuel Quality Management from AFS

Fuel quality doesn’t just come out of a container—winterizing your fuel is only part of the equation. Advanced Fuel Solutions partners with fleets nationwide to improve reliability, reduce maintenance, and optimize every gallon.

Fuel Testing & Monitoring

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Detect cold-weather risks before they cause downtime.

Custom Formulations

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Tailor protection for your exact fuel blend and regional climate.

Ongoing Support

Man wearing headset, using computer, customer service, support OPT AD.

Work with a dedicated AFS representative who understands your fleet and operating challenges.

Trusted by Fleets Across the Northeast

“Since partnering with AFS, we’ve seen a complete transformation in how our fuels perform during the winter months, resulting in smoother operations, fewer emergency calls, and a stronger reputation for dependable fuel quality.”

 — Ed Novack, Button Energy

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Request a FREE Fuel Analysis

Identify Cold-Weather Risks Before Winter Hits

Our strategically located analytical labs will test your diesel for cold-flow performance, water, contamination, and microbial growth.  Identify problems early and take the steps to prevent gelling, filter plugging, and costly downtime.

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Keep Your Fleet Running All Winter Long

Don’t let cold weather bring your operations to a stop. With OPT Winter Formulation, your fuel stays protected, your equipment runs reliably, and your drivers stay on schedule.

The lowest-cost fuel isn’t always the lowest operating cost. Let’s talk about how better winter protection can save your fleet time and money in the long run.

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