This is a discussion on Fuel Question within the Dodge Dart General Discussion forums, part of the Dodge Dart Forum - Dodge Dart Discussion category; 100 is expensive 8.99/gallon 110 i think was 5.60/gallon 92 is 4.56/gallon ya not very many stations carry those grades. I think chevron is the ...
100 is expensive 8.99/gallon 110 i think was 5.60/gallon 92 is 4.56/gallon ya not very many stations carry those grades. I think chevron is the only one that lets sunoco put those at their stations. even here i didn't know about those until I started working there.
Last edited by RC31; 07-31-2012 at 06:16 PM.
Aviation gasoline. But it's a waste of money, not to mention illegal in most places to use it in a car.
My late father, who was an automotive engineer back in World War II days (before shifting to rocketry, enabling me to boast as a kid, "as a matter of fact, my Dad is a rocket scientist"), used to say that if a car didn't knock there was no reason to use higher octane gasoline. Chrysler says 91 gets better fuel economy in the 1.4 Fiat Multi Air Turbo. Can anyone explain why higher octane, which generally has nothing to do with the energy content of the fuel, would result in better gas mileage, if that's what they mean?
The Low-Down on High Octane Gasoline
Are you tempted to buy a high-octane gasoline for your car because you want to improve its performance? If so, take note: the recommended gasoline for most cars is regular octane. In fact, in most cases, using a higher octane gasoline than your owner’s manual recommends offers absolutely no benefit. It won’t make your car perform better, go faster, get better mileage or run cleaner. Your best bet: listen to your owner’s manual.
The only time you might need to switch to a higher octane level is if your car engine knocks when you use the recommended fuel. This happens to a small percentage of cars.
Unless your engine is knocking, buying higher octane gasoline is a waste of money, too. Premium gas costs .15 to .20 cents per gallon more than regular. That can add up to $100.00 or more a year in extra costs. Studies indicate that altogether, drivers may be spending hundreds of millions of dollars each year for higher-octane gas than they need.
What Are Octane Ratings?
Octane ratings measure a gasoline’s ability to resist engine knock, a rattling or pinging sound that results from premature ignition of the compressed fuel-air mixture in one or more cylinders. Most gas stations offer three octane grades: regular, usually 87 octane, mid-grade, usually 89 octane and premium, usually 92 or 93. The ratings must be posted on bright yellow stickers on each gasoline pump.
What’s The Right Octane Level For Your Car?
Check your owner’s manual to determine the right octane level for your car. Regular octane is recommended for most cars. However, some cars with high compression engines, like sports cars and certain luxury cars, need mid-grade or premium gasoline to prevent knock.
How Can You Tell If You’re Using The Right Octane Level?
Listen to your car’s engine. If it doesn’t knock when you use the recommended octane, you’re using the right grade of gasoline.
Will Higher Octane Gasoline Clean Your Engine Better?
As a rule, high-octane gasoline does not outperform regular octane in preventing engine deposits from forming, in removing them, or in cleaning your car’s engine. In fact, the U.S. Environmental Protection Agency requires that all octane grades of all brands of gasoline contain engine cleaning detergent additives to protect against the build-up of harmful levels of engine deposits during the expected life of your car.
Should You Ever Switch To A Higher Octane Gasoline?
A few car engines may knock or ping — even if you use the recommended octane. If this happens, try switching to the next highest octane grade. In many cases, switching to the mid-grade or premium-grade gasoline will eliminate the knock. If the knocking or pinging continues after one or two fill-ups, you may need a tune-up or some other repair. After that work is done, go back to the lowest octane grade at which your engine runs without knocking.
Is Knocking Harmful?
Occasional light knocking or pinging won’t harm your engine, and doesn’t indicate a need for higher octane. But don’t ignore severe knocking. A heavy or persistent knock can lead to engine damage.
Is All "Premium" Or "Regular" Gasoline The Same?
The octane rating of gasoline marked "premium" or "regular" is not consistent across the country. One state may require a minimum octane rating of 92 for all premium gasoline, while another may allow 90 octane to be called premium. To make sure you know what you’re buying, check the octane rating on the yellow sticker on the gas pump instead of relying on the name "premium" or "regular
PITCH Black Clear Coat, Limited Leather Seats Black,
1.4L Turbo Engine, 6-Spd C635 Dual Dry Clutch
is happy...life is good :)
Is it bad to mix octane? Say I'm down to 3/4 of a tank and I have 87, can I top off with a higher octane?
2013 Dodge Dart Rallye 1.4L
6 spd Manual Transmission
F/R Splash Guards
F/R Slush Mats
GunMetal Wheels (PlastiDip)
Rear Diffuser Panel
is can count backwards from
AFAIK, it's not the fuel's energy content. it's the fuel's ability to resist detonation. with 91 octane fuel, the 1.4L turbo can generate more torque at any given throttle position (without detonation), hence needing less throttle pressure to achieve the same forward motion. the fuel consumption difference between 91 & 87 may be difficult to calculate during everyday driving but i'm sure it's measureable under controlled testing conditions.
Originally Posted by oldionus
using higher than recommended octane fuel may actually cause driveability issues because of the high DI (driveability index) of higher octane fuels.
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no harm in mixing. thats how sonoco blends at the pump.
Originally Posted by mopargal
Just so everyone knows, unless your engine is knocking very badly, you won't know. In other words, you could be getting knock from not running 91+ octane (anything above 93 is not needed!!) and it will pull timing and result is less power. It's not necessarily dangerous, but for the extra ~$3 per tank, it's worth using premium.
is Wanting to install other car
Octane got covered in depth up there^^^
Originally Posted by RC31
The ethanol is the corn based fuel that's cheaper. They mix it in (usually at 10% from what I've seen in OK). It can mess up things in gasoline engines not designed for its use. When they first started putting it out a lot of boats and atv's (in OK at least) got messed up by it because they didnt have to mark it in the pumps, now it has to be clearly marked Mainly affects the rubber and plastics. We notice our 2003 grand caravan feels sluggish if we put gas with ethanol in it. We now avoid ethanol stations like the plague.
2013 Dodge Dart SXT Rallye 1.4T
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