Do fuel efficient cars typically use higher octane gasoline?

Do fuel efficient cars typically use higher octane gasoline?
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1 Answer

Answer :

No, higher octane fuel is only necessary for higher performance cars. Highly efficient cars can usually use the lowest octane fuels, because they are not designed for performance.
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Is it true that higher octane gasoline is consumed more slowly by engines,and it doesn't pay to purchase regular gasoline solely to save $$ when it is not required for your vehicle?

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Which of the following gasoline (unleaded) has the least octane number? (A) Catalytically cracked gasoline (B) Straight run gasoline (C) Catalytically reformed gasoline (D) Polymer gasoline

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The octane rating of gasoline provides information on(a) its antiknock properties(b) its ignition properties(c) its percentage proportion of octane(d) its percentage content of isooctane

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Octane number is related to (a) Gasoline (b) Kerosene oil (c) Diesel oil (d) Lubricating oi

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What are some of the most fuel efficient cars?

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Last Answer : Toyota Prius 48 city/45highway

Why are we making such expensive fuel efficient cars?

Description : Why are we making such expensive fuel efficient cars?

Last Answer : Well, the large vehicle corporations want to make money and large fortunes off the mass hysteria of global warming and the middle east being the only fuel source we turn to, we as people are ... price. So, the car companies creating the hybrids find these issues to be great tools for marketing

What is the average miles per gallon for cars that are considered fuel efficient?

Description : What is the average miles per gallon for cars that are considered fuel efficient?

Last Answer : According to the government, the minimum MPG a "fuel efficient" car right now must get is 27.5. That has been the case for almost 20 years. Next year it will change to 30.2 MPG. Most cars you find will exceed those numbers.

Are used hybrid cars efficient in fuel and friendly to our environment?

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Last Answer : Absolutely. Used hybrid cars are just as useful as used gasoline cars. There are fears that the batteries are "used up" in used hybrid cars, but the lifetime of the batteries is very long and this should not be a problem.

Which cars are the most fuel-efficient?

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Last Answer : Any car that is labeled as a "hybrid" is going to be more fuel efficient. Some of the most fuel-efficient cars of 2011 are the Nissan Leaf, the Telsa Roadster, the Chevrolet Volt, the Smart car, the Toyota Prius, and the Honda Civic Hybrid.

What are the most fuel efficient vehicles including both hybrid and/or conventional trucks and cars?

Description : What are the most fuel efficient vehicles including both hybrid and/or conventional trucks and cars?

Last Answer : Overall, smaller more compact cars will have better fuel efficiency than larger heavier SUV's. While the average mileage of a compact hybrid is close to 40MPG, average SUV MPG is closer to 20.

Higher efficiency in the combustion of solid fuel cannot be achieved by (A) Proper fuel preparation (B) Keeping the flue gas exhaust temperature very high (C) Adopting efficient-fuel firing technique & equipment (D) Supplying correct quantity of combustion air

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Last Answer : (B) Keeping the flue gas exhaust temperature very high

What is the quality rating for diesel fuel, similar to the octane number for petrol?

Description : What is the quality rating for diesel fuel, similar to the octane number for petrol?

Last Answer : Catane number

Which of the following fuel detonates readily? a) Benzene b) Iso-octane c) Normal heptane d) Alcohol

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Which of the following fuel has little tendency towards detonation? a) Benzene b) Iso-octane c) Normal heptane d) Alcohol

Description : Which of the following fuel has little tendency towards detonation? a) Benzene b) Iso-octane c) Normal heptane d) Alcohol

Last Answer : Answer: b Explanation: Benzene has little tendency towards detonation.

A fuel of an octane number rating of 75 matches in knocking intensity as a mixture of a) 75% iso-octane and 25% normal heptane b) 75% normal heptane and 25% iso-octane c) 75% petrol and 25% diesel d) 75% diesel and 25% petrol

Description : A fuel of an octane number rating of 75 matches in knocking intensity as a mixture of a) 75% iso-octane and 25% normal heptane b) 75% normal heptane and 25% iso-octane c) 75% petrol and 25% diesel d) 75% diesel and 25% petrol

Last Answer : Answer: a Explanation: None.

The two reference fuel used for cetane rating are (a) Cetane and iso octane (b) Cetane and tetra ethyl lead (c) Cetance and n-heptane (d) Cetane and α- methyl naphthalene

Description : The two reference fuel used for cetane rating are (a) Cetane and iso octane (b) Cetane and tetra ethyl lead (c) Cetance and n-heptane (d) Cetane and α- methyl naphthalene

Last Answer : Ans : d

Why iso-octane is chosen as reference fuel for S.I. engines and allotted 100 value for its octane number ?

Description : Why iso-octane is chosen as reference fuel for S.I. engines and allotted 100 value for its octane number ?

Last Answer : Iso-octane permits highest compression without causing knocking.

Why iso-octane is chosen as reference fuel for S.I. engines and allotted 100 value for its octane number ?

Description : Why iso-octane is chosen as reference fuel for S.I. engines and allotted 100 value for its octane number ?

Last Answer : Iso-octane permits highest compression without causing knocking

Which hydrocarbon molecule with eight carbons would produce the lowest octane number (i.e., the most knocking) when used as a fuel in automobile? (a) 2-Methyl-3,3-dimethylpentane (b) n-Octane (c) 2-Isopropylpentane (d) 2-Methylheptane

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Last Answer : n-Octane

A fuel with octane number 90 means it is as good as a mixture of : (a) 90% Isooctane + 10% n-heptane (b) 90% n-Heptane + 10% isooctane (c) 2 Litre of 90% isooctane + 2 litre of benzene(d) 2 Litre of 90% n-heptane + 2 litre of benzene

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Last Answer : 90% Isooctane + 10% n-heptane

In any fuel, the percentage by volume of isooctane in a mixture of isooctane and n-heptane which will knock under same conditions as the fuel being tested, is called : (a) Cracking (b) Iodine number (c) Aromatization (d) Octane number

Description : In any fuel, the percentage by volume of isooctane in a mixture of isooctane and n-heptane which will knock under same conditions as the fuel being tested, is called : (a) Cracking (b) Iodine number (c) Aromatization (d) Octane number

Last Answer : Octane number

Write the values of boiling temperature for cetane(diesel).iso-octane(petrol), Butane, Propane an methane fuel and write effect of it on its system.

Description : Write the values of boiling temperature for cetane(diesel).iso-octane(petrol), Butane, Propane an methane fuel and write effect of it on its system.

Last Answer : Write the values of boiling temperature for cetane(diesel).iso-octane(petrol), Butane, Propane an methane fuel and write effect of it on its system.