46 votes
Accepted

What is in fossil fuels that we can't mass produce?

Oil as it comes out of the ground is a mixture of hydrocarbon compounds that are the remains of deposits of algae and microscopic animals, also called phytoplankton and zooplankton. Scientists have ...
saurabh64's user avatar
  • 1,062
42 votes

What is in fossil fuels that we can't mass produce?

What's in fossil fuel that we can't reproduce is energy. We've been making synthetic fossil fuels in one form or another for about two centuries: town gas (a methane substitute), synthetic gasoline, ...
Mark's user avatar
  • 747
36 votes
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Do cars consume less fuel when in Neutral?

If the car is equipped with a modern fuel injection system, it will likely use less if left in gear and allowed to run against the transmission with no throttle as modern fuel injection systems can ...
Steve Matthews's user avatar
35 votes

What is in fossil fuels that we can't mass produce?

The other answers are right, technically. As they say, what's in it is energy, or hydrocarbons, or whatever you want to call them. Burnable stuff. Unfortunately, the first two laws of thermodynamics ...
Dewi Morgan's user avatar
29 votes

Small amount of wrong fuel type put in the tank

The main concern with using petrol in diesel systems is that diesel is used to lubricate the fuel pump, which petrol cannot perform adequately, which will shorten the useful life of the fuel system. ...
Zaid's user avatar
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27 votes
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What causes a 20% difference in fuel economy between winter and summer?

Your fuel economy change is caused by the fact you're not using the same fuel. Fuel changes twice per year from summer blend to winter blend and back again causing a change in the Reid Vapor Pressure (...
spicetraders's user avatar
  • 1,533
23 votes

Ford Focus hard to start after fueling

The next time you plan to buy gas, open the gas cap, do not add gas, leave the gas cap open for the amount of time it normally takes to fill the tank, then replace the gas cap and start the car. Hard ...
MTA's user avatar
  • 6,145
19 votes
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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
18 votes

Ford Focus hard to start after fueling

Modern cars all have what is called the evaporative emission control (EVAP) system. This is a system of valves, tubes, and a charcoal canister that is supposed to capture the excess vapors from the ...
jwh20's user avatar
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16 votes
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Does a carburettor engine apply fuel at high speeds when the pedal is no longer depressed?

At a base level, carburetors meter the amount of fuel they let into the engine by the amount of air that is moving through them. Vacuum is created by the piston moving in the engine and creating an ...
Justin Lloyd's user avatar
16 votes
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Small amount of wrong fuel type put in the tank

The main problems from misfueling a diesel car with petrol stem from the fact that (as Zaid points out) petrol doesn't provide the lubrication effect of diesel fuel and as a solvent it can actually ...
motosubatsu's user avatar
15 votes
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Is it really not advisable to let your fuel tank get low on fuel?

The problem with running the tank low in older cars is that the fuel cooled the fuel pump. The fuel pump would just hang out in the bottom of the tank with all the fuel and the fuel would wick away ...
vini_i's user avatar
  • 16k
15 votes

Why is the engine on my Royal Enfield Classic 350 shutting down?

IMO you have a fuel starved vehicle. Perhaps some blockage in the gas tank at the petcock filter or an inline filter between your gas tank and the carburetor. When you run the bike the fuel might ...
DucatiKiller's user avatar
  • 32.9k
15 votes

Does a carburettor engine apply fuel at high speeds when the pedal is no longer depressed?

Carburettors are very crude in comparison to EFI systems, and so the amount of fuel entering the engine is simply a factor of the amount of air going in, which is controlled by the position of the ...
Nick C's user avatar
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13 votes
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Do I need any special maintenance plan for a car only driven a every couple of weeks?

It sounds like you're spot on for your car. Words of advice: If you only want to change the oil once a year, use something like Mobil 1 Annual Protection, which is a full synthetic oil. It's good for ...
Pᴀᴜʟsᴛᴇʀ2's user avatar
13 votes
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Fuel gauge very slow to come up after filling - anything to worry about?

There's 2 possibilities here. The first is that you have an electro-mechanical fuel quantity meter, and that it may be sticking a bit due to a lack of movement. The good news is it did eventually ...
GdD's user avatar
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11 votes

What is in fossil fuels that we can't mass produce?

They can They have strung together various polymer chains in the lab and their even hydrocarbons. The University of California Berkeley is doing it now. It's not really a question of it being done. ...
DucatiKiller's user avatar
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11 votes
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What's the meaning of a "lean" vs "rich" air fuel mixture

I do not know the etymology of these words or the history of their use in the context of air-fuel ratios, although their dictionary definitions (lean [adj.], rich, too bad I don't have an OED ...
Jason C's user avatar
  • 4,890
11 votes

Small amount of wrong fuel type put in the tank

This will not be a problem - in fact, some of the older truckers used to add 2% of petrol to the diesel to help in winter conditions to help reduce waxing of the diesel fuel.
Solar Mike's user avatar
  • 34.6k
10 votes

Lada Niva 1700 Carburetor Model

Blocked jets in the carburettor. Small particles of grit can block any one of the jets in these carburettors. The fuel still gets to the engine through the other jets but the efficiency is much ...
Chenmunka's user avatar
  • 1,432
10 votes

is there always pressure when taking off the gas cap? Does it relate to a full reading on gas guage?

The gas gauge measures the level in the tank by a float lever, not by pressure. So this doesn't affect your gas gauge. The overpressure in your tank is completely normal. Gas has a relatively high ...
sweber's user avatar
  • 7,057
10 votes

Does a carburettor engine apply fuel at high speeds when the pedal is no longer depressed?

Carburetor Circuits Will Still Pull Fuel from the System If the engine is running on a carbureted vehicle, off throttle or not, it will consume fuel. Throttle Settings There are three basic ...
DucatiKiller's user avatar
  • 32.9k
9 votes

Do cars consume less fuel when in Neutral?

If you're looking at just the fuel consumption whilst going downhill, then yes, as Steve Matthews said you'll use less fuel if you're in gear and foot off the throttle - likely no fuel at all. But ...
andrewb's user avatar
  • 1,046
9 votes

Do cars consume less fuel when in Neutral?

As Steve Matthews noted, modern cars will not use fuel while coasting downhill in gear. This is called Deceleration Fuel Cut-Off and uses various sensors to determine the engine load (i.e. the car is ...
Gargravarr's user avatar
9 votes
Accepted

How can vehicles run on E?

The gas gauge is just an indicator and each vehicle is going to be different. I know the older Datsun Z cars had two gas gauges, one was the main one which showed the volume of gas down to 1/4 tank, ...
Pᴀᴜʟsᴛᴇʀ2's user avatar
9 votes
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Direct Injection Injectors - How do they prevent blow back into the fuel system?

I will try to answer this as best as possible. There are a few factors that come into play here (Mainly the manufacturer of said engine). Direct injection petrol engines work much like a diesel. You ...
cloudnyn3's user avatar
  • 3,333
9 votes

Direct Injection Injectors - How do they prevent blow back into the fuel system?

In cylinder pressure is in the 200 psi range. GDI fuel pressure is varied from 500 up to around 3000 psi. This alone is enough to keep fuel blow-back to a minimum. Carefully engineered injector pintle ...
Fred Wilson's user avatar
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9 votes
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What is the "Activated Carbon Cannister"?

Gasoline is a pretty toxic liquid. And it evaporates pretty easily. The Carbon Cannister is a system to help keep toxic fumes from gasoline out of the environment. So here's how it works. You ...
zipzit's user avatar
  • 6,539
9 votes

Best way to repair a rotten fuel line?

To be honest, if part of the fuel line is rotten, I'd be tempted to replace the whole line - chances are the rest isn't far behind... Modern rubber hoses should last a decent amount of time, they're ...
Nick C's user avatar
  • 28.7k
9 votes

Why does "i" stand for petrol?

It stands for Injection as in Fuel Injection.
method's user avatar
  • 2,760

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