Red diesel fuel has a dye in it to separate it from green diesel fuel, which is not green at all. Blue and Yellow Flame Still, a few colors suggest the possibility of an underlying condition that will need to be diagnosed and treated by a doctor. [Verse 1] Am F Your little brother never tells you but he loves you so C G You said your mother only smiled on her TV show Am F You're only happy when your sorry head is filled with dope C G Your Review. Does orange mean the gas is "bad"? Next time you check your engine oil, pay close attention to what color … Wavian fuel cans come in five different colors, but it's not all just good looks.Fuel and oil cans are color coded to designate their contents. Therefore, you don’t need to look at the oil to check for fuel contaminants, you need to smell it. Oil color won’t generally be effected by gasoline contamination, but oil smell will change quite a bit, as the oil will smell much like gasoline. I find that I get a bit on the fouled side (not as bad as this) when stuck at idle due to unruly camshafts and such. Rating Bad Good. CARS.COM — Are you experiencing sputtering and other uncontrollable noises, perhaps a bit of sluggishness when driving your car? Automotive Forums .com Car Chat > Engineering/Technical > What is the Proper color for Gasoline? Read more to learn about each color. I was just at the repairshop cause my car is broken down and they told me they pulled something other than gas from gas tank. This color variation helps to keep clear fuel used by the general public separate from the gas used by government on-road vehicles. As we all know, there are plenty of things you need to take into consideration when it … Some people are convinced this is just another urban legend, and that people who worry about "old gas… Fuel dyes are dyes added to fuels, as in some countries it is required by law to dye a low-tax fuel to deter its use in applications intended for higher-taxed ones.Untaxed fuels are referred to as "dyed", while taxed ones are called "clear" or "white". API COLOR CODE CHART API-12. Depending on the Grade of the Gasoline and the Additives that have gone into the Fuel the color of Gasoline could be anything from a very light hue of Green to very transparent colorless with a yellow/gold hue. The coloring is part of a new effort by two federal agencies, as well as Congress, to clean the air and collect fuel taxes. Sue Wadden, color expert at Sherwin-Williams, shares her picks for the 5 most relaxing bathroom colors to transform your space into a spa-like retreat. • Desiccant Vent Breather Sizing Chart $ 0.00 0. Continue. Having a nice car is a pretty big investment for most of the people. Excessive smoke coming from the exhaust of your car for long periods of time is not only bad for your engine but the environment as well.