What does diesel smell like ?

sagor

Joined Mar 10, 2019
1,046
Furnace oil is about the same as diesel, they are actually interchangable in farm tractors. SLight differences in additives and such, but one can run furnace oil in a diesel tractor.
That said, there are winter blends and summer blends for vehicle diesel, which makes a small difference as well.
Bottom line, they generally smell the same....
 

jpanhalt

Joined Jan 18, 2008
11,087
Come on. Pure cetane (the basic measure for diesel) is virtually odorless. Biodiesel can smell like French fires when burned. Fuel-grade diesel has a petroleum smell that is distinctly different from automotive gas or aviation gas (100LL aviation fuel has a much sweeter smell from the octane). The real problem in many circumstance is telling pure gasoline or pure diesel from mixtures. That can be a deadly mistake if used to fuel aircraft.

If the TS wants to tell the difference between diesel and gasoline, just pour some on the ground. Gasoline evaporates quickly; diesel does not.

If the TS can describe with words (not comparisons) what a rose smells like, then I will do the same for diesel.
 

dl324

Joined Mar 30, 2015
18,220
Does it smell like household furnace oil ? Just wondering in regards to something else that can have a "diesel" smell
It should smell like diesel. They add a dye to diesel used for heating because they don't charge road-type taxes on it. The colorant lets them detect improper usage in autos.
 

SamR

Joined Mar 19, 2019
5,470
Not just heating. Marine, Farm, Construction, etc. are all dyed except what you buy at the filling station pump which is road taxed. At the Talladega 500 a couple of years back they were taking samples from all the Class A pusher RVs tanks at the gate and issuing tickets for having dyed fuel.
 
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