6th Jun 2015, 05:06

I've been using cheap gas (91 octane) on my 1986 Porsche with 186000 miles because those gas stations are closer. I change the oil yearly with non synthetic oil, however I do my own maintenance. My uncle worked for a refinery and said all gas is standard unless the gas station owner adds water. The formula is just a marketing gimmick.

6th Jun 2015, 14:00

If you think "all gas is standard", then why are you using 91 octane instead of 87 octane?

7th Jun 2015, 11:27

You can't add water to gas to dilute it like whiskey. Gasoline is immiscible in water, and will float as a layer or little beads on top of the water.

7th Jun 2015, 14:01

All my cars and 2 motorcycles take 93 octane. Straight out of the owner's manual. Maybe you should read up on low octane and high octane. And ethanol issues. I don't even like water in my vehicles unless I am washing them. Let alone getting into the fuel system. Acid rain is bad on new car finishes. If I couldn't have a garage, I would rent an apartment and take a bus.

8th Jun 2015, 21:56

Not true - the vehicle is constantly in motion and thus the gas and water keep mixed and do not form different layers while the vehicle is in operation.

9th Jun 2015, 09:46

Please don't listen to these guys and add water to your tanks.

10th Jun 2015, 18:03

Are you from the Middle East and want to go with the, "Gas is cheaper than water" argument? In North America, gas is at least 5-8x as expensive as water right now, even totally pure water. It's economically lucrative to blend some water with the gas.

10th Jun 2015, 18:37

I can't wait to see how far this conversation is going. Some neat terminology can be learned. Words such as misfire, pistons, engine detonation, and tow truck are handy words when putting water in your fuel tank. Water does not ignite or burn. I would rather see you improve the air flow and inflate your tires up to a safe pressure, and take out the extra junk in your car weighing it down.

11th Jun 2015, 15:55

Even if the water doesn't form a layer, it still forms little beads suspended in the gasoline, regardless of how much it's agitated. When those beads get pulled into the fuel line, they can clog the main jet or fuel injector. But if you want to mix in some water with your gas to stretch your budget, go ahead and have it your way.

11th Jun 2015, 16:01

What in the heck is going on here? Please do not add water to gas. Doing so will absolutely ruin the engine, assuming it will even start.

11th Jun 2015, 20:35

Imagine buying a car like this. Cutting corners is a disaster. I've bought cars with women's pantyhose instead of an oil filter on a car. Horrible bondo. Cans of fix a flat inside tires. Used a scraper to clean oil pans; on and on to shave a buck. This is one to add to the list.

12th Jun 2015, 17:09

Water molecules are not volatile like hydrocarbons, and thus don't have an ignitable vapor and can't release energy in that engine. So, the car wouldn't move, but in no way would it be damaged. The products of combustion are water and carbon dioxide. Thus, every time you combust hexane/octane in your engine, you release water! How could that damage the engine? If anything, some extra water will "clean it out". And, for the shrewd service station manager, he could sell 10 gallons of gas which may actually be 9 gas/1 water, and his running costs decrease, which is good for his business. The driver will only get 9 miles worth of range from driving on that tank because the 1 gallon of water wouldn't contribute anything to the car's movement.

13th Jun 2015, 10:12

Carry less fuel in the tank for higher mpg. It won't be much, but it's better than buying new pistons from the octane drop combined with the H2O. If it even starts without backfire or excessive miss. The latter will decrease your MPG. So you are worse off with your driveway chemistry experiment.