Questions tagged [gasoline]

Colloquial term for 'gasoline', a liquid petrochemical refined from crude oil and used in internal combustion engines as fuel.

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77
votes
10answers
45k views

What are the benefits of premium (high octane) petrol?

Here in the UK it's common for petrol (gas) stations to offer both regular and "premium" unleaded petrol. The premium stuff is (naturally) more expensive, and I've often wondered what the actual ...
53
votes
6answers
51k views

Why do heavy vehicles almost always use diesel engines?

I have always wondered why heavy vehicles such as large trucks and buses almost always use diesel engines, whereas in light cars there is a choice between diesel and gasoline engines. Engine ...
20
votes
5answers
19k views

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

I've seen a number of sources that state you should keep your car's gas tank at least half full, some of which saying it's only important in winter. Some examples: http://www.osceolagarage.com/why-...
18
votes
2answers
317k views

What happens if you put the wrong kind of gas in your car?

I (like most people) just use regular unleaded gas in my car and always have. But once I accidentally put in the premium kind, mixing it with the unleaded that was already there, and I thought for ...
17
votes
5answers
10k views

Why not use gasoline on diesel engines or vice versa?

I've read gasoline engines use sparks to ignite the mixture, but diesel engines use just compression which can't be done in gasoline engines due to high compression ratios which can cause engine ...
17
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5answers
7k views

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

Because they're older, my in-laws have been in quarantine since early March and haven't driven their car at all. It's been sitting in the driveway in New Jersey (USA) the whole time, in mostly above-...
17
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3answers
40k views

Why does diesel engine have redline much lower than petrol engine redline?

Why do diesel automotive engines redline at around 4500 rpm whereas petrol ones go to 6500-8000 rpm? Does this have something to do with the compression ratio?
14
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6answers
60k views

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

I read many articles online and people have different opinions about this issue. Some say 89 is the best for acceleration. Others say 87 is just fine. I'm worried only about the health of my car. ...
12
votes
4answers
5k views

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

Why do we mostly use fossil fuel instead of something like... Alcohol? We used it in a portion of our gas, so why don't we use it in greater quantities? Obviously there's a reason. My guess is ...
12
votes
3answers
6k views

Wrong octane fuel

I have a 2014 Fiat Punto and have been using 92 octane gas. I have never read the manual, but am now told I should use 95. Should I use what is in the tank before filling with 95 or is it OK to mix ...
11
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3answers
3k views

Toyota Prius Mk2 “gasoline only” operation mode

I want to get a used Toyota Prius Mk2 (XW20). I do not necessarily need to operate it in hybrid mode (gas + electric) and I am OK with operating it in a kind of "gasoline only" mode (because of a ...
9
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5answers
167k views

How long will gas stay fresh in a five gallon plastic container

How long will a 5 gallon plastic containers of fuel stay fresh?
8
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7answers
8k views

Why does a petrol engine need to maintain an air-fuel ratio, while a diesel engine doesn't?

This simple question has been bugging me for a while. The amount of fuel injected into a petrol engine is calculated according to the amount of air entering through the throttle valve (as measured by ...
8
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3answers
3k views

My BMW 325xi smells like gas

It is difficult to start my BMW it runs rough and smells like raw gas from the exhaust pipe. My check engine light is on. What could be the problem? I just had the engine replaced I am over 8,000 ...
8
votes
2answers
375 views

What is the Capacity of Gas Station Pumps After the Fuel Mixing Point?

I ride a vehicle with a small fuel capacity - my typical fill-up is about 3 quarts. What I want to know is if I'm filling up at a pump that has one hose for all grades do I get the grade I select, or ...
7
votes
3answers
2k views

Does the mileage indicate the quality of the gas?

I've been getting gas for my 2010 Ford Taurus at Get-go and always was able to get a full tank. The front panel indicated 420 miles left to empty Example: But now for a couple of months, I wasn't ...
7
votes
1answer
16k views

Why is there a hissing noise when I open my petrol cap?

When I fill up with fuel, there is often a loud hissing noise, as if you are opening a bottle of fizzy drink or something whenever I unscrew the petrol cap. It also seems like there are vapours ...
7
votes
1answer
5k views

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

I had my sportbike in storage for at least 3 years. It is Electronic Fuel Injected. It had a full tank of Premium Gas (Shell or Mobil). I put in STA-BIL to preserve the gasoline. Is the gas beyond ...
7
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1answer
3k views

2009 Hyundai Sante Fe - gas smell in cabin after replacing fuel sending unit. has been repaired 4x's now

Fuel sending unit replaced. Since then it has gas smell in car. It has been redone by mechanics four times now but still has a gas smell when the gas level is in the first quarter of the tank. Cap ...
6
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2answers
3k views

Petrol vehicles, what are the advantages and disadvantages of a turbo charger?

Diesel vehicle often use turbo chargers. Petrol vehicles frequently do not. What are the advantages and disadvantages of using a turbo charger on a petrol engine?
6
votes
1answer
9k views

Can diesel engine be harmed as easily as gasoline engine by over-revving?

There is an excellent Q&A about why diesel engines have lower redline RPMs (about 4500 RPM) than gasoline engines (about 6500 RPM). The reason is related to the combustion of diesel fuel. However,...
6
votes
1answer
54 views

1998 Oldsmobile Intrigue - Takes fuel super slow

I think someone tried to siphon my gas tank and now it fills super slow. Like ten minutes slow. So what part might be damaged and would it be in the fuel tank itself or in the fuel tank neck?
6
votes
1answer
158 views

What is the problem if my car's engine stops running in the middle of a ride?

My car's engine frequently stops in the middle of a ride. Its an old model of Hyundai Sonata 2004. This happens especially in high gears(3,4) and faster speeds (like 60-70 mph). It has also happened ...
6
votes
1answer
120 views

Why is there no drop-in biogasoline like there is drop-in biodiesel (e.g. NEXBTL)?

I have always wondered why there is no drop-in biogasoline like there is drop-in biodiesel. For example, NEXBTL by Neste can be run at 100% mixture in conventional diesel engines. It is different from ...
6
votes
1answer
950 views

2001 Subaru Legacy L Wagon - Gas smell and light shaking

So... It is really freezing and has been really cold these past few days. But, my 2001 Subaru Legacy L Wagon started acting up. First, here are things I know been replaced before I got it - Tires, ...
5
votes
1answer
1k views

2020 explorer will not fill up

My 2020 ford explorer will not let me fill up. I tried to fill up yesterday and it only let me put 0.336 gallons in and it started spitting it back out. I only have between three quarter and a half in ...
5
votes
2answers
15k views

Hands still smell like gasoline after multiple washings, it is safe to handle food?

I have been reparing my weed wacker, so I have the gasoline/oil mixture on my hands. I have washed them twice with hand soap, once with orange soap scrub, once with dish soap, once with hand ...
5
votes
2answers
460 views

Old, oily, wet gasoline. What to do with it? [duplicate]

I have a small amount (less than a gallon) of gasoline that's been in a can for two years. It has oil mixed in for 2-stroke engines. The can sprung a leak and rainwater leaked inside. Probably only a ...
5
votes
2answers
10k views

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

This is a little more specific than the "wrong fuel" question: I'm looking for the long term impact of using a higher-octane fuel in an engine designed for lower octane fuel. Not quite diesel in a gas ...
5
votes
2answers
228 views

Is it a good idea to top off the gasoline with higher octane fuel in a specific case?

When topping off the gasoline in a vehicle that is rarely driven (100 miles/month), is there any advantage in topping it off with a higher octane gasoline? I've heard stories that the octane of ...
5
votes
1answer
323 views

Dust in gasoline

I noticed some dust in the funnel when I filled my car's tank in a an emergency. Is this dust harmful to the engine? Will the fuel filter remove it?
5
votes
2answers
4k views

Using regular unleaded gasoline in a Lexus RX330

Is it OK to use Regular Unleaded Gasoline in a 2005 Lexus RX330? In the past I have used Super but am now using Regular. So far no problems.
5
votes
2answers
1k views

Do I need to eliminate old gas before changing fuel injectors?

I have a truck with a full tank of gas (12-16 gallons?) that's been sitting for 12 months and I'm about to change the fuel injectors. The truck can barely make it around the block due to stalling out ...
5
votes
1answer
993 views

Re: Dry Gas (specifically STP Water Remover)

Well, it's butt cold here in Maine & my car wouldn't start. It has a 1/4 tank of gas & I was unable to add 1/2 bottle of dry gas as it comes out very fast. So despite the directions on the ...
5
votes
2answers
525 views

Evaporator canister purge system advice needed

1995 Blazer - 4.3 L Vortec V6 CMFI (vin W w/ PCM) 230,000 miles There are no trouble codes. This is a OBD-I or 1.5 system from a GM transitional year (I have the OBD-II style connector). I have ...
5
votes
1answer
75 views

Gas filled my engine

I'm a little puzzled on my 33 I have a 302 ( stroker 363 )) Dart block with brodex heads with a small blower. after blowing up my power glide I pulled the engine and just now reinstalled it. after ...
5
votes
0answers
513 views

What causes more gas consumption - Idling with AC or Heat? [duplicate]

So I have begun doing some research on the effects of idling. So my question is, does idling with the AC or heater on affect how much gas is given off? If possible, please give the percent of extra ...
4
votes
3answers
2k views

What causes more gas consumption - Idling with AC or Heat?

So I have begun doing some research on the effects of idling. So my question is, does idling with the AC or heater on affect how much gas is given off? If possible, please give the percent of extra ...
4
votes
3answers
2k views

Is it necessary to turn off the engine while refuelling?

At petrol stations in Australia, there are always several signs that say "Turn off engine while refuelling" (or something of the sorts). Is this necessary to do, and why, or is just something that is ...
4
votes
3answers
228 views

What non-driver, non-terrain factors can affect vehicle miles per gallon?

I've been tracking the mileage on my 2015 VW Golf (a non-intercooled turbo, but not diesel, thank goodness). Of course, my driving habits and highway/city balance influence things greatly, but beyond ...
4
votes
1answer
2k views

Old gas in 2 cycle engine

I have a 2 stroked engine that sat for over 2 years. I drained the gas and can get it to turn over when I put starter fluid in the carb. it is blowing out a water substance from the muffler and cuts ...
4
votes
2answers
236 views

Worried I put in wrong grade of gas

I selected the wrong grade of gas, but then I quickly pushed the correct button on the pump. Does it change after it starts?
4
votes
1answer
303 views

Is it fine to use higher octane gasoline than what is recommended on the fuel cap sticker

I've got a 2000 W202 Mercedes C240. It's got a V-shaped, six cylinder gasoline engine. On the fuel cap, it says RON 95 EN 228. And in the manual also it says "Use only Premium Unleaded petrol". I ...
4
votes
4answers
160 views

Engine MPG / Economy

I drive a 4 cylinder Mitsubishi lancer evolution and I CAN get UP TO about 20 mpg on the highways. What determines MPG? How is it that engines with twice the number of cylinders, and in some ...
4
votes
1answer
164 views

What should I expect as result of a firmware update fixing NOx emissions in a gasoline engine?

I received an invitation from Peugeot asking me to bring a 2018 naturally aspirated gasoline engine Peugeot 208 (61 kW) to the workshop for a firmware update fixing lamba sensor management which ...
4
votes
2answers
82 views

E10 petrol safety

I sometimes visit Finland taking my car, though I am not living there. There's a kind of petrol marked E10. Somewhere I've read that this kind of petrol can be harmful for some kind of cars (for the ...
4
votes
2answers
2k views

Proper fuel type for Toyota Prius 2011

I have a 2011 Toyota Prius, and where I live there are only two types of gasoline: 90 and 95 (RON). In the refueling section in the car manual it says: "Use unleaded gasoline. (Octane Rating 87 [...
4
votes
1answer
783 views

Is stale gas a real problem with plug-in hybrids?

Due to environmental considerations, I am planning to purchase a plug-in hybrid electric vehicle when the vehicle I want becomes available (RAV4 Prime). However, I am concerned of the gasoline in the ...
4
votes
1answer
2k views

Starting fluid, does it require a spark or autoignite?

If a four stroke gasoline engine (inline-four, digital fuel injection) starts with starting fluid (but not without it, and stops firing when the spray is removed), is this an indication that the spark ...
4
votes
1answer
73 views

Snowblower - 2 cycle oil without stabilizer

I'm not sure if this is the correct forum for this question. I have some 40:1 mixed gas (for my snowblower) that is about 6 month old with no stabilizer added. I haven't t tried it yet but should ...