1. Is it better to only fill your gas tank up about half way or 2/3 rather than completely full?
2. How much more does it ACTUALLY cost to use mid-grade opposed to normal unleaded and high-grade opposed to mid-grade?
my thoughts:
For the first one, the extra weight from the full tank of gas could decrease fuel economy, but also, if you filled up less that would mean you'd have to fill up more often, using gas in the process.
and for the second one, the higher grade costs more, but possiblly increases fuel economy because of it's higher octane.
2006-10-01 13:38:02 · 11 answers · asked by ? 1 in Cars & Transportation ➔ Other - Cars & Transportation
1. NO
2. It might actually cost less to use high-grade because of the increase in fuel economy.
2006-10-01 13:40:29 · answer #1 · answered by jim k 2 · 0⤊ 2⤋
Unless your car requires a higher octane then use the regular. The higher octane really doesn't do much as far as fuel consumption. There has been several studies done on this and the higher octane gas for the most part just costs more...it does not help economy at all.
Fill it up...your car is designed to handle this capacity. If you only fill it half or 2/3 then you risk the chance of getting less pure gas over all. Most gas contains a certain amount of water...and this can be increased if not filling up. And trust me from experience...water and gas do not mix.
One more tip...when filling up...ask the gas station when the pumps were refilled...if it's been less than 24 hrs go else where for your gas...as when filling the tanks it mixes the water that is in the storage tanks in the gas and this takes about 24 hrs to settle.
2006-10-01 20:46:37 · answer #2 · answered by Kenneth S 5 · 1⤊ 1⤋
Your on the right track less weight not only is better for mileage but is also good for brakes. Keeping the car clean and waxed helps too. Filling the tank in the early evening is best for evaporation. But your reasoning about 1/2 or 2/3 full is flawed. Fill till the pump clicks off. over the course of emptying the tank it will be at 2/3rds and 1/2 and 1/4 so weight will be divided by the number of miles full to empty. Use only the necessary octane not a higher grade unless your car requires it or pings. Cars that need 91 octane get better mileage with high octane. So three dollars more is washed by better mileage.
2006-10-01 20:50:51 · answer #3 · answered by John Paul 7 · 1⤊ 0⤋
Unless you are driving a one ton truck with a thirty gallon or so tank you are just wasting time and fuel making extra stops. Gasoline is kess dense than water so it really doesn't weigh that much unless you are driving a formula one or Indy car with a curb weight of less than fifteen hundred pounds. Most cars weigh twice that amount.
The recommended octane level for your car is in the owners manual, manufacturer's website, dealership or on the sticker inside the fuel door. Higher octane will not increase your fuel economy unless your are driving an old junker that has dirty injectors or carbon on the back of the valves that needs to be burned off.
it would help to know the year make model and engine size and what mileage you are currently getting to be more specific with answers.
2006-10-01 20:57:09 · answer #4 · answered by cubcowboysgirl 5 · 1⤊ 0⤋
1. No. Any minute savings you may see by moving less weight is more than erased by having to stop for gas more often.
2. No matter what the inbreds may want you to believe, using higher octane gas DOES NOT increase fuel economy. As a matter of fact, many independent tests have conclusively proven that using a higher octane than you need for your particular vehicle will actually decrease gas mileage AND performance.
2006-10-01 20:51:36 · answer #5 · answered by vwhobo 4 · 1⤊ 0⤋
1. The extra weight from a full tank of gas as opposed to a 1/2 tank of gas is negligible.
2. There's usually about a dime per gallon difference between the lowest grade of fuel and the highest grade of fuel. And the higher grade doesn't really increase fuel economy very much. It's more of a performance (for more horsepower) fuel.
2006-10-01 20:50:50 · answer #6 · answered by HULK RULES!! 7 · 1⤊ 1⤋
First question: The difference in weight in a half full and full tank is not enough to measure any difference in fuel economy.(unless you have a 200 gallon tank.)
Second question: All modern cars are optimized for the rated fuel. If your car is rated for 87 octane, it will not get better mileage on a higher grade.
2006-10-01 20:48:13 · answer #7 · answered by eferrell01 7 · 1⤊ 0⤋
higher octane doesn't increase economy, it supposedly increases performance.
I'd say 2/3 full if your tinkering around town, but fill it up on long drives. I think the weight of the gas is negligible and can be offset by wind and aerodynamics.
2006-10-01 20:42:14 · answer #8 · answered by Anonymous · 1⤊ 0⤋
first one..........if you only fill your tank 2/3 you make more trips to the station............fill it and spend less of your time, also if the station charges for using the card regardless of the card you are loosing money. second look at the handbook for the car, it should specify the grade of fuel in it, i own a Cadillac and it calls for regular, so check your owners handbook
2006-10-01 20:46:43 · answer #9 · answered by george m 3 · 1⤊ 0⤋
Amm here in indiana Gas is like 2.03 so yea.. i dont know!
2006-10-01 20:41:56 · answer #10 · answered by sublime_style2006 2 · 0⤊ 2⤋