AMSOIL Diesel 4-IN-1 Fuel Additive

Understand this product

Diesel 4-IN-1 combines injector cleaning, lubricity support, cetane improvement and cold-flow treatment in one diesel additive. It suits a different maintenance goal than a single-purpose injector cleaner or an emergency recovery product.

Check the current dose chart and add it at the time and fuel temperature stated on the label. Cold-flow results depend on the fuel being treated; an advertised laboratory improvement is not a universal minimum operating temperature.

Diesel fuel-system maintenance

Choose the treatment by its purpose: injector cleaning, cetane improvement, cold-flow prevention or recovery from gelled fuel. These jobs are different, even when products share the same shelf.

No universal vehicle fitment is implied by this listing. Use the exact product or part number when checking application information.

Specifications & product documents

Product

AMSOIL Diesel 4-IN-1 Fuel Additive

Brand

AMSOIL

Listed grade

See product documentation

Application status

Verify the exact equipment requirement

• Read / download product bulletin (PDF) g3525.pdf · 210 KB · web-optimized copy · Downloaded October 24, 2026Original manufacturer PDF ↗
• Read / download product bulletin (PDF) G3525_4_IN_1_0425.pdf · 225 KB · web-optimized copy · Downloaded October 24, 2026Original manufacturer PDF ↗

The manufacturer bulletin contains the detailed applications, test methods and any service limitations. A published typical test value is not a guarantee for every operating condition. “Recommended for” language should not be read as a claim of formal manufacturer approval.

Official AMSOIL product information ↗ · Listing reviewed October 24, 2026. Local PDFs are web-optimized saved copies; consult the official source for later revisions.

Use it as part of a complete service plan

Plan preventive cold-weather treatment before fuel wax forms. A recovery product serves a different role after a cold-weather problem occurs. Persistent starting trouble, smoke or loss of power warrants diagnosis rather than repeated additive use.

Before you order

1. Confirm the exact product, specification and application.
2. Check the package size or part number below.
3. Review the current label and bulletin for restrictions.
4. Complete your purchase on AMSOIL.com using the selected package.

Need help narrowing the choice? Contact Kyle Holdridge with the equipment model and required specification.