Would low grade gas damage an engine?

non stabilized fuel and poorly filtered fuel can damage your fuel pump, filters and injectors/carburetor(s). If you do this, I would advise you to buy engine stabilizer and add it to the low grade gas. By doing this, you pretty much take away the benefit of buying cheap gas anyway so just buy the good stuff. Chevron's gas is the best by the way.

If you are talking lower octane, use what your owners manual says. Using lower than recommended octane may damage the engine. Using higher octane will not help anything. Now let's get to some of the other myths here. Water in gas????? Go out and get a cup of gas from your mower can. Add some water and watch what happens. The water will sink to the bottom. You cannot ad water to gas and have it mix. therefore adding water to gas would not gain a station anything. As far as name brand vs cheaper gas stations; there was a study done recently where a lab took gas from BP and Shell along with 2 non name brand stations and tested it. There was no difference in the gas. The name brand did however have more detergent. All gas sold is mandated by law to contain a minimum amount of detergent. So buy the cheap stations gas that is rated at the proper octane for your car. The only thing I would say is stay away from any station while the tanker is filling the underground tanks. All moisture and sediment sinks to the bottom and while the truck is filling the tanks, it may get stirred up. Other than that buy what you want.

I personally feel that Arco gas is the worst, and Chevron gas is one of the better choices for fuel. I live in California, and those are the two names of gas stations out here. Your state gas station names may be different.

It's a good idea if your car can take it, to use the higher grade of octane every once in awhile...switch for instance from 87 octane to 89 octane. 92 octane is for higher performance vehicles. So check with your mechanic or vehicle manual.

I wouldn't make a habit of using low grade fuel, (cheap 87 octane gas) even though I realize that it's cheaper. Maybe do it once a week. Over time, I think it can be bad for your engine. Keep your car engine tuned and keep up with your oil changes to prolong the life of your vehicle as well.

Good luck.

I wouldn't advise using an octane lower than the manufacturer suggests as that MAY damage the engine. As far as quality, there's basically no difference between equal octane gas. The difference in price may be related to regional differences, additive differences or simply supply and demand. You can use Conoco instead of ExxonMobil - as long as it is the same octane.

Low grade gas can be pretty bad for an engine. You can lose some power and get a lot of sludge, but it won't cause any damage you will see immediately. Overtime, you will see the damage. It can also shorten you engine's lifetime.

I have always bought gas from the cheapest places in town, and have never had any issues. A lot of them are pumping "name brand" gas anyways, it just comes in an unmarked truck.

If you're talking about using 87 instead of 92 octane, very few cars require the premium fuel anyways. So unless your car requires premium, you're just wasting money.

Yes. Low grade gas will leave deposits in your combustion chamber and valves. If you drive a nice car, be nice to it and it will treat you right.

it depends how much water they put in it to increase the volume. im sure the attendant will be happy to tell you the water content of thier petrol