Doc's Diesel DEF Guard, SCR Cleaner Reduces Crystal Buildup, 8 oz - size: DEF Guard Additive, 8 oz (Single Bottle)
Doc's Diesel DEF Guard, SCR Cleaner Reduces Crystal Buildup, 8 oz - size: DEF Guard Additive, 8 oz (Single Bottle)
About this item
- Cuts Crystal Buildup: DEF leaves hard white crystals behind in tanks, pumps, and injectors as it dries. DEF Guard conditions the fluid so buildup drops across the parts plain DEF would crust over.
- Works in Any SCR Diesel: Universal formula suitable for any diesel truck, pickup, or equipment with a DEF tank and an SCR system, and for any ISO 22241 DEF. Pour it straight into the DEF tank, no tools.
- Stabilizes Every Tank: Added at fill-up, DEF Guard keeps the fluid stable in storage so it stays in-spec down to the last pour.
- What You Get: One 8 oz bottle of DEF Guard. Add 1 oz per 2.5 gallons of DEF, so the bottle conditions up to 20 gallons.
- Cheaper Than SCR Repairs: DEF on its own leaves residue behind, and that residue is what sets off the fault codes and derates that put trucks in the shop. A few ounces per fill costs far less than an SCR repair bill.
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Reviews
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Ethan Parker — Columbus, Ohio
The products were easy to browse, and the specifications helped me compare the options before ordering. Everything arrived as expected and worked well for my garage project. I would shop with WrenchVanta again when I need more parts or tools.
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⭐⭐⭐⭐⭐
Marcus Bennett — Phoenix, Arizona
I ordered several maintenance items and was pleased with the overall experience. The product information was clear, the items were packaged securely, and everything fit the needs of my project. A practical store for automotive and garage essentials.
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⭐⭐⭐⭐⭐
Olivia Turner — Tampa, Florida
WrenchVanta offers a useful range of products without making the shopping process feel complicated. I found what I needed for routine vehicle maintenance, and the order arrived in good condition. The entire process was straightforward and convenient.
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⭐⭐⭐⭐⭐
Daniel Foster — Sacramento, California
I picked up a few tools and replacement parts for an ongoing garage project. The products matched their descriptions and have been useful so far. I especially appreciated being able to find different types of automotive supplies in one place.
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FAQ
How can I confirm that a part will fit my vehicle?
Review the fitment information, dimensions, specifications, part numbers, and compatibility notes shown on the product page before ordering. Vehicle requirements can vary by year, make, model, engine, trim, and configuration. If you are unsure, consult a qualified mechanic or contact us before placing your order.
Do you sell products for motorcycles and ATVs?
Yes. WrenchVanta carries products for motorcycles and ATVs, including selected body, engine, drivetrain, brake, suspension, electrical, lighting, exhaust, storage, and protective accessories. Always check the product description to confirm its intended application.
How can I track my order?
Once tracking information becomes available, it will be sent to the email address provided at checkout. Tracking activity may take some time to appear after the carrier receives the shipment. You may also contact us if you need help locating your tracking details.
Can items from the same order arrive separately?
Yes. Products may be stored or fulfilled from different locations, so an order containing multiple items may arrive in separate packages and on different dates. When available, separate tracking information will be provided for each shipment.
Can I change or cancel an order after placing it?
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