Skip to content
PRICE DEMOLITION SALE: Hundreds of Job-Crushing Deals. Shop Now >
Northern Tool Equipment Logo TextNorthern Tool Equipment Logo text link to Home.

Free Gift Card on All Orders Over $100 See Details

Free Gift Card Details

$100 Order

$10
gift card

$250 Order

$25
gift card

$500 Order

$50
gift card

$1000 Order

$100
gift card
  • The promotion will be automatically applied on the Shopping Cart page.
  • To qualify for this offer, your order subtotal must equal $100 or more. Excludes gift cards, free item offers, warranties, Advantage memberships, tax and shipping.
  • Free gift cards will be issued in the form of e-gift cards only, not physical gift cards.
  • E-gift cards will be sent to the email address used in your billing address when your order ships or is picked up.
  • Free e-gift cards expire 11/01/26.
  • Promo code not valid on prior purchases or on Honda and STIHL products and cannot be combined with other promotional offers.
  • Valid online and in participating retail stores.
  • Limited-time offer. Subject to change without notice.
Print

Ultra1Plus Diesel Exhaust Fluid - 2.5 Gal., Non-Toxic, Meets ISO 22241 and API Certifications, Model# UL990

Item# 6501068
49 of 49 reviewers received a sample product or took part in a promotion
1 Included
Ultra1Plus Diesel Exhaust Fluid - 2.5 Gal., Non-Toxic, Meets ISO 22241 and API Certifications, Model# UL990

This is a carousel with one large zoomable image and a track of thumbnails on the left. Select any of the thumbnail buttons to change the zoomable image on the right. If a thumbnail is a video or 360 degree image thumbnail, or the last thumbnail in the list, the button will open the product media modal.

Ultra1Plus Diesel Exhaust Fluid - 2.5 Gal., Non-Toxic, Meets ISO 22241 and API Certifications, Model# UL990

Click or Tap image to Zoom

  • For use in all SCR emission control system.
  • Non-toxic, odorless and colorless.
  • Non-flammable.
  • Non-polluting.
  • Meets ISO 22241 and API certifications.

  • Prop 65 Warning: See Details

See full description

  • Description

  • Key Specs

  • Reviews

  • Q & A

  • Warranty

  • Compare

Product Summary

Diesel Exhaust Fluid (DEF) comprises a high-purity urea and de-ionized water solution, serving as the essential operating fluid for vehicles employing Selective Catalytic Reduction (SCR) technology. Engineers designed this technology to adhere to the stringent b2010 emission standards, aimed at reducing nitrogen oxide (NOx) exhaust emissions from diesel engines. The fluid is stored in a designated DEF tank and is injected into the exhaust system before the catalytic converter facilitates the conversion of NOx into harmless nitrogen and water vapor. How It Works The majority of contemporary diesel vehicles incorporate Selective Catalytic Reduction (SCR) technology, an innovative system that leverages Diesel Exhaust Fluid (DEF) to curtail emissions of Nitrogen Oxide (NOx) and Particulate Matter (PM) from diesel engines. DEF is a liquid mixture comprising 67.5% deionized water and 32.5% urea. When introduced into the catalytic converter, DEF instigates a chemical process that transforms NOx into water and nitrogen, resulting in a notable reduction in NOx and PM emissions, alongside a modest enhancement in fuel efficiency. Why not use a 100% urea solution? DEF provides the highest degree of practical NOx reduction in real life automotive conditions. Using DEF at a 32.5% solution in water is cost-effective. Also, it allows the engine to perform at the highest levels of efficiency and at the widest range of climatic temperatures – anything above 12 degrees Fahrenheit. Maintaining DEF It’s important that your vehicle’s supply of DEF is maintained, as government regulations prohibit you starting the engine without it. Your car’s message center will give you advance warning when your DEF level is low and will alert you in plenty of time to book a refill. Please refer to your Owner's Handbook for more information. What is the shelf life of DEF? If the DEF is stored at ambient temperatures of 75 F with no major periods of exposure to heat over 86 F then the batch of DEF will last roughly two years. If a package of DEF is exposed to periods of heating the fluid will last approximately one year.

What's Included

    (1) 2.5 Gallon JUG DEF

Downloads

Safety Data Sheet

Features + Benefits

  • For use in all SCR emission control system.
  • Non-toxic, odorless and colorless.
  • Non-flammable.
  • Non-polluting.
  • Meets ISO 22241 and API certifications.

Key Specs

AttributeSpecification

item#

6501068

Brand

Ultra1Plus

Manufacturer's Warranty

4 year limited warranty

Ship Weight

23.48 LB

Included (qty.)

1

Fluid Ounces

320 fl oz
AttributeSpecification

Gallons

2.5 Gal

Freezing Point

12 °F

Product Type

Diesel Treatment

Product Weight

23.4800 lb

Dimensions L x W x H (in.)

7.62 x 11.68 x 12.0 in

Reviews

Questions & Answers

49 Reviews This action will navigate to reviews.

Questions

Warranty

Manufacturer's Warranty

4 year limited warranty