Difference between standard and premium gas?

Question

What's the difference between regular and premium gas. Is premium gas just filter more to get more junk out?

And why do some cars only run on premium, regular just clogs their engines over time?

Answer 1

Actually, there is a really really good article on this topic here...See my link! It`s written from a scooter (read: Vespa type) website but it simplifies it. Adn not too techy like Mr. Know it all.

Answer 2

Higher octane ratings correlate to higher activation energies. Activation energy is the amount of energy necessary to start a chemical reaction. Since higher octane fuels have higher activation energies, it is less likely that a given compression will cause knocking. (Note that it is the absolute pressure (compression) in the combustion chamber which is important - not the compression ratio. The compression ratio only governs the maximum compression that can be achieved).

Octane rating has no direct impact on the deflagration (burn) of the air/fuel mixture in the combustion chamber. Other properties of gasoline and engine design account for the manner at which deflagration takes place. In other words, the flame speed of a normally ignited mixture is not directly connected to octane rating. Deflagration is the type of combustion that constitues the normal burn. Detonation is a different type of combustion and this is to be avoided in spark ignited gasoline engines. Octane rating is a measure of detonation resistance, not deflagration characteristics.

It might seem odd that fuels with higher octane ratings explode less easily, yet are popularly thought of as more powerful. The misunderstanding is caused by confusing the ability of the fuel to resist compression detonation as opposed to the ability of the fuel to burn (combustion). However, premium grades of petrol often contain more energy per litre due to the composition of the fuel as well as increased octane.

A simple explanation is that carbon-carbon bonds contain more energy than carbon-hydrogen bonds. Hence a fuel with a greater number of carbon bonds will carry more energy regardless of the octane rating. A premium motor fuel will often be formulated to have both higher octane as well as more energy. A counter example to this rule is that ethanol blend fuels have a higher octane rating, but carry a lower energy content on a volume basis (per litre or per gallon). The reason for this is that ethanol is a partially oxidized hydrocarbon which can be seen by noting the presence of oxygen in the chemical formula: C2H5OH. Note the substitution of the OH hydroxyl radical for a H hydrogen which transforms the gas ethane (C2H6) into ethanol. Note that to a certain extent a fuel with a higher carbon ratio will be more dense than a fuel with a lower carbon ratio. Thus it is possible to formulate high octane fuels that carry less energy per liter than lower octane fuels. This is certainly true of ethanol blend fuels (gasohol), however fuels with no ethanol and indeed no oxygen are also possible.

Answer 3

2 ingredient is difference. First is oftentimes the fee. top classification is regularly somewhat greater the common. 2nd is the octane extensive variety. top classification has a much better octane extensive variety than customary. in the experience that your automobile is below guarantee and it says to apply a undeniable gas you probable would desire to apply it because of fact in the event that they might tutor you used a diverse sort it ought to void your guarantee. probable won't do any injury on your engine, won't have the zip it has on top classification or it would make somewhat noise. some engines run extra beneficial on top classification and others run ok on customary.

Answer 4

The difference is octaine standard is about 83 or so octaine and preimiem is 93 octaine, This means for example most High end sports cars only run on prem becaeuse the combustion needs to be higher octaine and lower will just screw up the car. well kinda hard to explain unless u have any knolladge of mechanics

Answer 5

What they said. At least Mr Knowitall knows how to copy and paste.