Ultra-Low Sulfur Diesel (ULSD) Deliveries in DE, MD, & PA
Hillside delivers both on-road and off-road Ultra-Low Sulfur Diesel (ULSD) to keep your trucks, tractors, and other vital equipment running smoothly.
Ultra-Low Sulfur Non-Highway (Off-Road) Diesel Fuel Dyed Diesel: This red-dyed diesel is legally designated for off-road vehicles, including farm tractors, construction equipment, and generators. Because it’s not for use in on-road vehicles, it is exempt from state and federal road taxes.
Ultra-Low Sulfur Highway (On-Road) Diesel Fuel Clear Diesel: Clear diesel is fuel without dye, used in on-road vehicles like cars, trucks, and SUVs. It is legally taxable and required for any diesel-powered vehicle licensed for on-road use.
For more information on vehicles and fuel requirements, visit the EPA Diesel Fuel Standards and Rulemakings.
REQUEST ULSD DELIVERY
This contact form does not substitute for a service call request. Please call our office 302-738-4144 or 410-398-2146. Thank You.
Ultra-Low Sulfur Diesel (ULSD)
What is Ultra Low Sulfur Diesel Fuel (ULSD)?
ULSD is a cleaner diesel fuel with sulfur content reduced to 15 parts per million (ppm) or less, which is 97% lower than older diesel fuels with 500 ppm sulfur. Reducing sulfur helps eliminate particulates, or soot, which contribute to diesel engines’ black exhaust and air pollution. The shift to ULSD improves air quality by lowering harmful emissions from diesel engines.
Why Ultra Low Sulfur Diesel Fuel (ULSD)?
The biggest advantage of ULSD is that it burns cleaner, reducing pollution and extending the life of engines designed for it. ULSD works with emission control devices on many vehicles to further reduce harmful exhaust.
The EPA highlights several benefits of ULSD, including improved public health, lower carbon emissions, and environmental protection. ULSD has a sulfur content limit of 15 ppm and is required for all on-road diesel engines from the 2007 model year onward.
Benefits of Switching to ULSD:
- Healthier workplace: ULSD reduces the long-term risks of heart and lung disease, asthma, and other respiratory conditions.
- Longer-lasting equipment: It extends the lifespan of your equipment, leading to fewer repairs and oil changes.
- Regulatory compliance: Your fleet will be better prepared for future EPA regulations, ensuring compliance and reducing future costs.
Join Over 5000 Customers Who Trust Hillside For
- Modern Energy-Efficient Products
- Exceptional Customer Service
- Fast and Flexible Scheduling
- Up-Front and Fair Pricing
- Industry Leading Warranties
- Excellent Service and Maintenance Plans
- Courteous and Professional Technicians
- Over 70 Years of Industry Expertise
THE TRUSTED COMFORT EXPERTS OF DE, MD, & PA
WE LOVE OUR CUSTOMERS
All of our work is guided by three generations of family attitudes and values – respect, loyalty, integrity, accountability, honesty, kindness. We pride ourselves on building excellent relationships with our customers, some of whom we have served for decades, and then gone on to serve their children for decades. Above all, we know what it’s like to be a customer and how we’d like to be treated.
That’s why we’re so honored to have received thousands of glowing ratings, reviews, recommendations, and testimonials from our heating and cooling customers. It means the care we put into our work shows through, and that we truly are doing customer service right.
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Joe RoachJanuary 29, 2025recommends
Hillside is great for both repairs and major system replacements. Reasonable prices and great service!Posted on Facebook![]()
Lauren RiebelNovember 26, 2024recommends
This was our first time using this company & we will absolutely be using them again. Our technician was extremely knowledgeable & friendly. He really took the time to explain everything to us & didn’t try to sell us something new. I would 100% recommend this company to anybody in the area for any of your heating and cooling needs.Posted on Facebook![]()
Wendy LewisJuly 25, 2024recommends
My technician, Michael Fields II, assures me that all is well with my systems. I trust his assessment so feel confident that we will stay cool this summer and be warm this winter. He was polite, friendly, considerate, and EXTREEMLY popular with my pets. Bodhi and Baxter, one of the 2 dogs and one of the 2 cats, were very happy to follow him everywhere in the house. All 4 pets waited for him each time he went outside and made sure to get pets upon his return. I love that Michael came back this year and continues to take care of my systems as his father did before him. Very cool! Many thanks, and the crew looks forward to his return!Load more
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R MAugust 25, 2026
Very professional. Highly recommendPosted on Google![]()
Brandon ElmanAugust 17, 2026
Justin from Hillside came out to do a tune-up on our heat pump with auxiliary oil and replace a fuel gauge. He was very helpful in answering questions and service was fast, professional, and affordable.Posted on Google![]()
Aaron WrightAugust 12, 2026
Great service by great people. Highly recommended.Load more
Proudly Serving New Castle County, DE, Cecil County, MD and Southern Chester County, PA.