Originally posted by: glenn1
Why is red diesel illegal?
Illegal for on-road use because it's not taxed.
Yup. They can get you for tax evasion for using the stuff. Don't f*ck with the IRS...they were the ones who brought down Al Capone.
Originally posted by: Mark R
The fuel dye has been designed to be easily detectable. It is visibibly detectable even at dilutions of 1:50 or 1:100. Use of optical analytical equipment can detect dilutions of 1:5000.
In some areas, the dye may also be isotopically labelled with Carbon-13 (this isotope is very rare in natural oil) and this allows detection of the dye down to dilutions of 1:100000 using a gas-chromatograph-mass-spectrometer. Additionally, the isotope label is not destroyed by 'laundering' techniques that chemically destroy the dye, or bleach it with UV light.
While the dye does not damage or stain components of the engine, it's ability to be detected in trace amounts mean that, in suspected cases, forensic examination of engine parts (e.g. fuel filter or fuel pump) to extract samples of fuel may be worthwhile, even if tainted fuel is not detected in the main tank.
So if you buy a truck from a farmer who only used it off-road (and of course ran the red diesel), they can bust you for detecting a 1:100,000 dilution now that you're running regular diesel?:roll: