Po gas vs PE gas?

[Jeffs2006EvoIX]

I read somewhere that the additive packs in top tier gas are in higher concentration but some leave more deposits than others. Something to the affect that "PO" based additives are better than "PE" based because they don't leave behind as many deposits? Chevron/Texaco with techron and Shell are the only PO based.

I don't know what the "PO" or "PE" stand for and this was read on some forum somewhere and was a post by a chemist. I may have them backwards even but seemed the censis was Chevron/Texaco and Shell are the fuels to buy to really keep your engine clean.

I was interested in this because my VW TSI motor is a DI motor and like many other DI motors have a tendancy to carbon up. VW does state in the manual to use "top tier" gas if available.

Anyone can shed some more light or explain this better? Is this valid?

Jeff

 

[Donald]

While I have no idea if you are right or wrong, I have a hard time believing that Exxon/Mobil would miss the boat on this one and would use an additive that would leave behind more deposits than other additives. Or maybe there is more to the story.

 

[Clevy]

Originally Posted By: Donald
While I have no idea if you are right or wrong, I have a hard time believing that Exxon/Mobil would miss the boat on this one and would use an additive that would leave behind more deposits than other additives. Or maybe there is more to the story.

Gotta be more to the story. I may not like Exxon as a company but I seriously doubt they would risk their reputation by producing a lesser product than their competition.
Mobil has always had products that are as good as or better than what's on the market.
There was a thread that posted detergent levels of top tier stations. Mobil had the most detergent levels in the regular flavour and shell the highest in the premium category. So I don't see how that would translate to more deposits especially since most use regular and that's where Mobil is tops.

 

[Coprolite]

I try to rotate my top tier gas under the theory that they different detergents attack different deposits.

I will also rotate my oils on the new truck as long as I can find rebates, before settling into a groove.

 

[Jeffs2006EvoIX]

What the theory is and I will look for the link I read it in states that the additves some brands use themselves leave deposits that's why folks rotate top tier brands. The story goes that the additives in Shell, Texaco and Chevron leave no residual affects therefore no rotation of brands is necessary. I also thought it was interesting that Chevron was the 1st gas in the USA to meet top tier status. More research needs to be done on this subject. I'm looking...

I want to make clear all gas must leave some kind of deposits behind but seems techron leaves the least as does shell v-power....again will do more research and post it when I can.
Jeff

 

[danthaman1980]

Shell and Chevron/Texaco are the only two companies commonly known to use PEA (polyether amine) cleaners in their gasoline - Chevron/Texaco's Techron additive is known to be PEA. Shell's 'nitrogen enriched' gasoline is most likely PEA (any Chemistry 101 student will tell you an 'amine' is a nitrogen-containing compound) - This makes sense to me, since it is widely known that SOPUS (Shell Oil-Pennzoil U.S.) owns GUMOUT and GUMOUT/Regane contains PEA. I believe Shell's off-the-shelf V-Power additive is also PEA.

No other gasoline is known to contain PEA. Chevron/Texaco is generally thought to be the best cleaning gasoline.

Not trying to be a gasoline-snob (I only recall using Chevron/Texaco a handful of times in my life, even when I lived in Texas where it was readily available. I do use Shell once a month or so). I use cheap gas most of the time, as long as it is name brand from a high volume station I'll use it.

 

[Jeffs2006EvoIX]

Thanks for the clarification on the terms for the gas. Reason why I use the "top tier" gas is because it is recommended by VW in my owners manual. Additonally, the TSI engine in my GTI has been known to carbon up due to the DI engine. The use of these "top tier" fuels may just make that much of a difference to prolong the longevity of the engine. Hence the recommendation from VW.

In contrast, if I was driving a normally aspirated, standard fuel injected auto then I would be just trying to use the cheapest gas it would run on. In this case of my car, being Turbo Charged, and DI and with a history of carbon build up in past FSI motors it just makes sense to follow VW's recommendations.

I just find this subject interesting. True all base gasoline in itself is the same, I think we all get that, I do find though that the additives themselves make for a charactoristic of each brand. This charactoristic, like car engines each carry their own personality so to speak. Some cars like certain additives better than others. I do believe this to be true.

Jeff

 

[Jeffs2006EvoIX]

So is it true that PEA additives do not leave deposits behind as non PEA additives are known to do? Common sense tells me all additives will leave something behind, but then again I am no chemist.

The only reason I ask is some engines are prone to carbon build up more than others. Example Direct Injected Engines (Gas). IMO if there is a fuel that may create the least amount of deposits or keep them under control, that would be the fuel to use.

Any thoughts??

Jeff

 

[cchase]

Yes,

The type of fuel you use in a DI engine is not going to have a significant impact on intake valve deposits.

 

[Durango]

Originally Posted By: Jeffs2006EvoIX
I read somewhere that the additive packs in top tier gas are in higher concentration but some leave more deposits than others. Something to the affect that "PO" based additives are better than "PE" based because they don't leave behind as many deposits? Chevron/Texaco with techron and Shell are the only PO based.

I don't know what the "PO" or "PE" stand for and this was read on some forum somewhere and was a post by a chemist. I may have them backwards even but seemed the censis was Chevron/Texaco and Shell are the fuels to buy to really keep your engine clean.

I was interested in this because my VW TSI motor is a DI motor and like many other DI motors have a tendancy to carbon up. VW does state in the manual to use "top tier" gas if available.

Anyone can shed some more light or explain this better? Is this valid?

Jeff


Jeff,

Generally speaking any "top tier" gas should have enough additives to keep your engine clean. Wether one brand of "top tier" gas is better over the other I can't say. If you want a higher concentration just buy a bottle and add it to your tank of "top tier" gas perhaps twice per year and you should be good to go.

Durango