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45 votes
Accepted

Do cars consume less gasoline when the tank is full?

No. If anything you'll get worse gas mileage with a full tank because you're carrying a heavier load (more fuel = more weight). What you are most likely experiencing is the top half of the tank is ...
Pᴀᴜʟsᴛᴇʀ2's user avatar
30 votes
Accepted

How to (relatively safely) store a small amount (200 milliliters) of gasoline for up to a month?

You can use a camping fuel bottle. They are usually made of aluminum, they are made to hold flammable liquids including gasoline, and they do not leak. I have seen them as small as 500 ml, and you ...
MTA's user avatar
  • 6,435
27 votes

Why do we mostly use fossil fuel instead of a more reliable and larger sum fuel?

What you really want to look into is Energy Density. So called "Fossil Fuels" have a very high energy density, which is very important for a vehicle fuel since you have to load it and carry it around ...
JPhi1618's user avatar
  • 13.2k
27 votes

Should I really keep my gas tank at least half full?

I'd suggest there's credence for all of these Your fuel pump overheating if it runs dry Unbeknownst to most, the fuel in the tank cools the fuel pump in most vehicles. The pump sits in a ...
Pᴀᴜʟsᴛᴇʀ2's user avatar
26 votes

Wrong octane fuel

It's not a problem mixing them. Just start using 95 if that is what the engine calls for. You'll not create any issues doing so. Modern day engines have sensors which can adjust for the fuel. If ...
Pᴀᴜʟsᴛᴇʀ2's user avatar
23 votes

Why do we mostly use fossil fuel instead of a more reliable and larger sum fuel?

While energy density is a rather nice property of gasoline and diesel, it's not the primary driver of their use. Instead, the primary driver is a rather practical one: they're cheaper. On the ...
R.M.'s user avatar
  • 331
22 votes

Haven't driven a car since the start of the pandemic; can it be driven without special measures?

Cars are routinely left parked for three to six months or more without running, with no ill effects. I wouldn't hesitate to jump it and see if it'll start. As @BrianKnoblauch comments below, jumping a ...
DavidRecallsMonica's user avatar
21 votes
Accepted

Should I use gasoline 87, 89 or 93 on 2016 RAV4 SE

Realistically, if the manual and the manufacturer are stating you should use 87 octane, that's really what you should use. If you purchase more expensive 89, 91, or 93, you are just wasting money. The ...
Pᴀᴜʟsᴛᴇʀ2's user avatar
19 votes
Accepted

Accidentally put regular gas in Infiniti G37

It isn't going to matter in the long run and shouldn't cause you any issues to run the car with the tank of fuel you put in if that's what you decide to do. Cars don't have an octane sensor. What they ...
Pᴀᴜʟsᴛᴇʀ2's user avatar
14 votes

2020 explorer will not fill up

Are you sure the gas station was open? I recently had the same problem and found that the lights were fully on at the station, the digital readouts on the pumps were glowing, but the place was ...
Carguy's user avatar
  • 1,967
14 votes

Do cars consume less gasoline when the tank is full?

The best way to determine the actual fuel consumption is to brim the tank, drive till nearly empty then brim the tank again. Then you have an exact volume of fuel and a specific distance. Repeat over ...
Solar Mike's user avatar
  • 34.6k
12 votes

Do cars consume less gasoline when the tank is full?

IF - the tank was uniform in its dimensions - vertical sides, etc., and IF - the gauge sender worked exactly in a linear manner, and IF - the gauge responded in that same linear manner, and IF - the ...
Tim's user avatar
  • 428
11 votes

Wrong octane fuel

Presumably since you say "92 octane gas" you are not in Europe. The whole topic is a mess, because there are different scales for measuring "octane". The most common scale world-wide is RON, but ...
alephzero's user avatar
  • 2,954
11 votes

Can I dilute 2-stroke gas and run it in my riding mower to get rid of it?

As long as you dilute it there should be no issues. Mixing a gallon or so with 5 gallons takes a 50:1 fuel-to-oil ratio to about 250:1. In other words, the engine will never notice it.
jwh20's user avatar
  • 12.1k
10 votes
Accepted

Does the mileage indicate the quality of the gas?

It is not likely the quality of the gasoline causing the change. The sensors are unable to evaluate the chemical makeup of the fuel. It could be a change in your driving habits, changes in temperature,...
CharlieRB's user avatar
  • 9,015
9 votes
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Is it necessary to turn off the engine while refuelling?

Here is a link from the API (American Petroleum Institute) website. http://www.api.org/oil-and-natural-gas/consumer-information/consumer-resources/staying-safe-pump The article is called Staying safe ...
Old_Fossil's user avatar
  • 3,962
9 votes

Why does "i" stand for petrol?

It stands for Injection as in Fuel Injection.
method's user avatar
  • 2,770
9 votes
Accepted

Why does "i" stand for petrol?

The i is a leftover from the 1970s, when a few companies (BMW and Mercedes, notably) started replacing the carburetor on their petrol engines with fuel injection. The marketing department saw an ...
Hobbes's user avatar
  • 4,412
9 votes

Accidentally put regular gas in Infiniti G37

I had a G35. I believe there was language in the owner's manual that said regular gas would not hurt the engine but you would not get full performance.
Ross Millikan's user avatar
8 votes

Haven't driven a car since the start of the pandemic; can it be driven without special measures?

If you have the ability and access to some tools, remove the battery and bring it to your local national auto parts chain ie: AutoZone, AdvanceAuto Parts, Oreillys etc. You may want to call first to ...
mikes's user avatar
  • 19.9k
8 votes

How to (relatively safely) store a small amount (200 milliliters) of gasoline for up to a month?

One possibility is if you can find small engine gasoline / alkylate gasoline sold in a one-liter container. That gasoline burns very cleanly, can be stored for about 4 years with no degradation and ...
juhist's user avatar
  • 14.6k
8 votes

Does converting an older motor to ethanol have significant risk or damage?

There's really no issue inside of the engine which should preclude you from switching from a regular petrol (gasoline) type fuel to ethanol. The reason for this is, ethanol doesn't affect the metal ...
Pᴀᴜʟsᴛᴇʀ2's user avatar
7 votes

My BMW 325xi smells like gas

The fact that you can smell fuel in the exhaust is a strong indication that the engine is running rich. This means that there is more fuel than required by the engine. There are many things which ...
Zaid's user avatar
  • 39.2k
7 votes

Why do we mostly use fossil fuel instead of a more reliable and larger sum fuel?

You absolutely can use ethanol instead of gasoline and disregarding some fairly minor technical issues they are more or less interchangeable. The issue is one of supply. We have the capacity to ...
Chris Johns's user avatar
  • 1,586
7 votes

MAZDA 3 2006 (UK) - poor acceleration then takes off at 3250 revs

My gut says it's likely to related to either a dodgy throttle position sensor or a faulty air mass meter. Whilst it is reporting no errors, it's worth doing diagnosis such as resetting the throttle ...
Steve Matthews's user avatar
7 votes

Haven't driven a car since the start of the pandemic; can it be driven without special measures?

One thing I would do is check all the fluid levels before starting it, even if only to drive it to get it serviced. Also the tyres may need some air. My brake discs rust easily in our wet climate, ...
Chris H's user avatar
  • 819
7 votes
Accepted

Can I dilute 2-stroke gas and run it in my riding mower to get rid of it?

You should be able to run this straight through your lawnmower without issue. As long as you aren't running it through your car with a catalytic converter it should be just fine. The thing which 2-...
Pᴀᴜʟsᴛᴇʀ2's user avatar
6 votes

How long can "Stabil"ized gas stay fresh? and can it be improved?

STA-BIL advertises gasoline integrity for 24 months It seems you have exceeded the advertised lifetime of 24 months by 12. Action Items Drain all fuel from the gas tank, fuel lines and fuel pump ...
DucatiKiller's user avatar
  • 32.9k
6 votes
Accepted

Will 93 octane fuel burn completely in an 87 octane engine?

"Higher octane" only means more knock-resistant. It does not mean "harder-to-ignite" or "hotter burning." A gasoline engine will not perform worse in any way on higher-...
feetwet's user avatar
  • 1,199
6 votes

How can I start my lpg toyota Yaris with a broken gasoline fuel pump so I can bring it to the specific repair shop?

Any bodge involving using gravity to feed the petrol to the engine isn't going to work - it's a multipoint electronic injection system running at much higher pressures then gravity would produce. You ...
motosubatsu's user avatar
  • 10.1k

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