Video answer: Gasoline vs diesel
Top best answers to the question «How can you tell gas from diesel»
Gas is stored in red, while diesel should be stored in a yellow container. If you are color blind, just smell the fluids, they are very different. If you can't smell, stick your finger in and feel the fluid. Diesel is much more oily, while gas will evaporate quickly and make your finger cold.
A safer way to tell is to smell what you know is gasoline or diesel fuel, at the same time, compared they smell quite different. Another way is feel. Gasoline has the consistency of water and will dry almost to powder on your hands, while diesel is lighty oily and will stay wet on your hands much longer.
Video answer: The differences between petrol and diesel engines
10 other answers
Depending on the type of diesel fuel you buy, the fluid can range from a clear to yellowish-brown color. If it’s begun to darken, this could indicate that it’s starting to break down. Separation or Visible Sediment
Water can form in your fuel tank through condensation. If it gets bad enough it can prematurely plug up your filters. Old diesel that has sat idle for long periods of time are more susceptible to this problem. The first signs will be small black specks in your clear pre-filters.
Gasoline engines have spark plugs to start and ignite the gasoline vapor. Diesel engines compress the liquid fuel until it is heated to the required temperature and pressure for the diesel to self-ignite. It isn't necessarily flammable on its own. With gasoline, the performance is measured in octanes.
As others have stated diesel and gas have a very different smell. The color of the can should also be red for gas and yellow for diesel. In America you can also tell the difference by color. Gas will be almost clear with a yellow tint, and diesel will have either a blue tint for on-road and red for off-road.
Look for a sticker. Rental companies often put stickers in different places around the car to tell you which fuel to use. The first place you might see a sticker is on the car key. Or it might be on the dashboard, near the fuel gauge.
If your gas is orange in color it is probably old and won’t properly fuel your engine. If you know your gasoline is over a year old you should probably dispose of it and not use it in your engine. You can also buy more gasoline at your local gas station and compare the color of the new gasoline with the gas you had been storing.
By the way, if you want to know if there's gas in your diesel, drain some into into an open container. (do this out in the open) Use a long match stick and place the lighted match near the surface of the fuel. slowly lower the lighted match into the fuel. If it lights there may be gasoline in the fuel...
If you can’t find any sticker, open the flap on the car’s fuel cap as there might be a sticker on the inside. The sticker will indicate if the car is ‘Diesel only’, ‘Petrol only’. There may be other similar text that indicates the kind of fuel used by the car.
If in doubt , just strain it through a coffee-filter which is close enough in microns that a fuel filter has. Pour some of that diesel on some charcoal for barbecue use or paper and see if it will light or burn. Diesel and oil is the only fuel that I know off that will be good for years,.....besides natural gas and propane.
The correct way to test would be to pour a small amount out onto a surface and then hit it really hard with a hammer. If the fuel is petrol nothing will happen but if it is diesel, and we all know that diesel ignites under compression, it will explode with a big bang, probably. Watch out for where the hammer goes, though...