Techron fuel system cleaner

[Beefy]

I'll also say you're quite rude, so you should continue this discussion with someone else who cares to listen to you.

So basically, you know you are wrong and don't want to argue. Read the rest of your own damn link:
http://www.petroleum.co.uk/alkane-chemistry
"Alkanes are also known as paraffins, making this term highly confusing because paraffin also refers to a type of wax."

Alkanes are NOT wax. Using high octane fuel does NOT add waxes. Using high octane fuel does NOT leave waxy deposits from incomplete combustion.

 

[MikeM.]

Using high octane fuel does NOT add waxes. Using high octane fuel does NOT leave waxy deposits from incomplete combustion.

All true. Higher octane fuel is not achieved with additives, it is a different blend of the various distillates. Whether you could term the distillates "wax", not by my understanding of what "wax" is. But it doesn't matter what you call them, the CX-5 is engineered to run just fine on all typical gasoline above 87 octane (including 93 octane 'premium').

I run 87 because it's cheaper and the car runs great on it. But the car runs great on premium too. I don't know of any reason to pay more though.

 

[Beefy]

All true. Higher octane fuel is not achieved with additives, it is a different blend of the various distillates.

Thankyou. I feel like I was on crazy pills arguing with this one (insert relevant Mugatu image here).

I run 87 because it's cheaper and the car runs great on it. But the car runs great on premium too. I don't know of any reason to pay more though.

I've said it ad nauseum, but I run Shell 91 because it is the only fuel local to me that doesn't have ethanol in it. I'm still not convinced as to the long term safety on rubber parts, and am philosophically opposed to its use as a biofuel.

 

[RedBaron]

Octane is an alkane, hence the -ane at the end. Alkanes are also known as paraffins.

http://www.petroleum.co.uk/alkane-chemistry

"Paraffin wax is a white or colorless soft solid derivable from petroleum"

As the others said, the idea of higher octane gas leaving wax buildup in the engine is bogus. Read the article here about gasoline production - http://chemistry.about.com/cs/howthingswork/a/aa070401a.htm. Specifically:

Gasoline consists of a complex mixture of hydrocarbons. Most of these are alkanes with 4-10 carbon atoms per molecule. Smaller amounts of aromatic compounds are present. Alkenes and alkynes may also be present in gasoline.

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Higher octane fuel is not achieved with additives, it is a different blend of the various distillates.

Also not (completely) true. All gasolines come from the same base stocks and the same refineries - often (usually) across brands. The only differentiation between brands and octane levels is the additives put in by the gas companies. Specifically, with older "leaded" gas, the "lead" was from Tetraethyl Lead, an additive PURELY meant to increase the octane equivalent. Again from the above article:

Straight-run gasoline has an octane number of about 70. In other words, straight-run gasoline has the same knocking properties as a mixture of 70% isooctane and 30% heptane. Cracking, isomerization, and other processes can be used to increase the octane rating of gasoline to about 90. Anti-knock agents may be added to further increase the octane rating. Tetraethyl lead, Pb(C2H5)4, was one such agent, which was added to gas at the rate of up to 2.4 grams per gallon of gasoline. The switch to unleaded gasoline has required the addition of more expensive compounds, such as aromatics and highly branched alkanes, to maintain high octane numbers.

Having said all that, no reason to run higher octanes than necessary - unless you find a particular type of gas doesn't have ethanol in it

 

[IHeartGroceries]

^Not all. And not necessarily usually.
There're plenty of suppliers who don't participate in these exchanges, which essentially don't brand gasoline until custody transfer at distribution terminal level. However, very commonly at the trading level, it isn't uncommon for trades of bulkstock to take place, which could potentially place fuels refined by company X into company Y's downstream distribution.

It all varies market to market. For example, Shell may dominate one market/region, but have essentially no distribution or shareholder assets in another region, and must rely completely on exchange business (say, with Exxon), in order to compete and supply in that market.