But if the fuel gauge leaves us little cause for worrying about the level of our 18.3-gallon fuel tank, the 5.1-gallon Diesel Exhaust Fluid (or DEF) tank is doubly no cause for concern.

Diesel Exhaust Fluid is a critical component in a diesel truck's fuel system. Here's what it does and how much you can expect ...

You need several components to make the system work, including: A tank that can hold about 5 gallons of DEF. A heater to help prevent it from freezing if you drive in areas where the temperatures ...

MARKHAM, Ont. – Their acronyms may sound alike, but the care and attention required of DPFs and DEF are very much different. Diesel particulate filters (DPFs), of course, have been on all new trucks ...

It's easy to monitor this tank via the matching analog DEF gauge that sits opposite the fuel gauge. (Ram's heavy-duty diesel competitors rely on electronic gauges you must activate.) Running out ...

The DEF is stored in a separate, insulated, heated tank and typically has a blue filler ... you could have a fuel-gauge-like readout (Ram), a digital indicator (GM) or a simple “low” light ...

a full DEF tank should last 6300 miles, but, as everyone knows by now, your mileage will vary. While there’s no DEF gauge in our Range Rover (some vehicles have those now), the driver can ...

Just add it to the DEF tank to clean the entire system, dissolving deposits in the tank, pump, heater, sender, lines, injector, decomposition tube/reactor, and mixer. It clears P20EE and related ...

hose with automatic shutoff nozzle Thunder Creek's DEF Saddle Tank, available in 60- or 120 ... 12V sending unit with gauge, locking fill cap and skid base Includes a 25-ft. hose reel ...

As said port is often located next to the one meant for fuel, it can be easy to become confused and add DEF directly into the diesel tank. The consequences of such a mix-up can be quite dire ...

Usually, the DEF tank filler is placed right next to the fuel filler. This can sometimes confuse users to put DEF into the fuel tank. Such a mistake could be more expensive to fix than filling the ...