Archives: FAQs
A useful rule of thumb: 2.5 gallons of DEF lasts about 800 miles.
Another rough ratio: about 1 gallon of DEF per 50 gallons of diesel…
Since around 2010, many diesel vehicles (especially medium- and heavy-duty) are required by law to use SCR systems to meet emissions standards. DEF…
DEF is a mixture of 32.5% high-purity urea and 67.5% deionized water.
It is used in diesel engines equipped with SCR (Selective Catalytic Reduction)…
Penalties can include hefty fines (often thousands of dollars or more), being required to pay back taxes, and regulatory enforcement actions.
Under…
Technically, yes—they will still function.
However, mixing can complicate regulatory compliance (if the blend ends up in on-road equipment) and…
No, performance is essentially the same. The only difference is the dye (and tax treatment).
In some cases, dyed diesel may have slightly different…
No. Using dyed diesel in a vehicle that travels on public roads is generally illegal and subject to fines.
Regulators can detect even small amounts…
Because it is not taxed (or taxed less) like on-road (clear) diesel, dyed diesel can be significantly less expensive per…
Dyed diesel is chemically equivalent to clear diesel, but includes a red dye (often Solvent Red 26 or 164) as a marker.
That dye indicates the fuel…
Clear diesel is the standard “on-road” diesel fuel (also undyed) sold at pumps and used in vehicles traveling on public roads.
It is subject to…