About gasoline, diesel and other fuels.
38
votes
8answers
5k 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 ...
7
votes
1answer
1k views
how to optimize fuel consumption by changing the rear differential ratio?
Is it possible to improve the fuel consumption (decrease it) in my van by changing the rear differential ratio? I would like to optimize it for low-speed driving about 40 km/h (25 mph).
Is it true ...
22
votes
3answers
14k views
How long does it take for gas to go bad?
Approximately how long does it take for unleaded gasoline in the tank and fuel lines to become unusable in a car that is not being used? What causes this, and what can be done to prevent or remedy ...
8
votes
4answers
2k views
How to improve fuel economy in high-mileage car?
I'm driving an 2003 Acura TL 3.2 with 177K miles on it.
I bought the car with 110K miles on it.
It seems to me that the car is not getting the same fuel economy that it did when I acquired it. I ...
5
votes
2answers
7k views
Are fuel system cleaners (like Gumout) worth using regularly?
Are fuel system cleaners (like Gumout) worth using regularly?
4
votes
6answers
2k views
When given a choice between octane 89 and 93, which should I choose?
I just recently got a 2005 Volvo S40 with a turbo engine; I want to take good care of it, so naturally, when the instruction manual recommends 91 octane fuel but says it takes a minimum of 87, I have ...
14
votes
8answers
10k views
Will higher octane fuel improve gas mileage?
I've heard from some people that high octane fuel will increase gas mileage. Around here, we have the basic unleaded(87), mid-grade(89), and premium(93 or 91). I've been using the basic 87 unleaded ...
4
votes
4answers
477 views
Does the tachometer provide any indication of fuel usage?
So, I'm driving along on the highway with the A/C blasting when I notice the price of gas. It makes me think, "what can I do to increase my fuel efficiency?" Some of the tips I've heard have included ...
5
votes
2answers
749 views
How to know how much fuel is left when the light turns on
In general, where can one find information about the quantity of fuel that is left in the vehicle's tank when the warning light turns on?
More specifically, in a Suzuki Swift GLX (auto) 2010 model?
4
votes
1answer
853 views
Difference between high octane and low octane?
What is the difference between high octane and low octane fuel? I'm not asking if one is better than the other for my vehicle, specifically, but rather what occurs differently both scientifically and ...
