Shell's new V-power 93 octane gas...

[publicenemy137]

It claims to have 5 times the amount of gov't standards for cleaning agents and minerals, and the best gas ever created by shell. Says it cleans intake valves and injectors. Is this BS or do you think it actually works? If I use this gas should I still clean my injectors anyways? Is this "v-power' actually better than just any standard 93 octane gas?

[drdisque]

gas shouldn't even be touching the valves in a fuel injected engine.

[public]

It most certainly does in a throttle body system and a lot of multiport systems as well.

[MagicRat]

Originally Posted by public

It most certainly does in a throttle body system and a lot of multiport systems as well.

It does in ALL 4 stroke gasoline engines. Direct injection is only used in diesels and is still experimental for gas engines.

[-Jayson-]

stop wasting your money on 93 octane gas if your not boosted. . .

[public]

93 octane will help any engine and with proper adjustments to timing and cam will really rock. No boosting required. My old 413 wedge was N/A with dual quads on a old 383 factory cross ram intake. A couple of octane points made a LOT of difference.

[SaabJohan]

Typically gasoline contains some sort of cleaning addetive like BASF's keropur. It usually protects the exhaust valves, exhaust manifold and so on also.

Fuel in a fuel injected engine is often sprayed on the intake valves which helps it to vaporize.

[sracing]

Originally Posted by public

93 octane will help any engine and with proper adjustments to timing and cam will really rock. No boosting required. My old 413 wedge was N/A with dual quads on a old 383 factory cross ram intake. A couple of octane points made a LOT of difference.

BUZZZZ! Wrong. <g>

There is LESS BTU in high octane fuels. Higher octanes are ONLY beneficial when your effective compression ratio requires it.
If it isn't required you will LOSE HP (not to mention money) no matter what you do to your ignition timing. (POSSIBLY extreme retards in the cam timing would push one to a higher octane.)

OCTANE is NOT energy or HP.

Jim
SR Racing

[bjdm151]

Jim you are so mean,
I hope you quit smoking again,

Jim is right, do the research kiddies octane is not power.

But to answer the real question,

Shell V-power is no bullshit. In April of this year GM, toyota, honda, and BMW set out to encourage refineroes to make a gasoline that would help reduce driveability complaints due to fuel related problems. What they came up with is better deposit control additives that will clean engine deposits. I'm not sure if shell V-power meets that criteria, but there are some gasolines labeled "top tier" that do meet these. I believe one is chevron. And the American petrolium institute is quite displeased with these manufacturers for doing this.

[Neutrino]

We are here to help each other, not show off, so I would apreciate if you would not use such expressions as: "BUZZZZ! Wrong." or "kiddies".

About octane you are of course correct, octane in itself does not mean more power. However in certain engines it will give the flexibily (since there is less knock risk) to the ECU to run optimal spark timing and af ratios resulting in more power.

[sracing]

Originally Posted by bjdm151

Jim you are so mean,
I hope you quit smoking again,

I know. I did.

I guess you can't say Buzz or Kiddie, but you can call people "clueless". (See some of the other sections.)

By the way did you see our picture on the board here? When Igor had us corner weight and dyno the car.

http://www.automotiveforums.com/350z...4/DSC00018.jpg

They also has some photos here from the GrandAm race, that you and Greg crewed , but no pics of you guys.

Jim

[bjdm151]

Yea I saw those pics. I can't believe i used to color my hair, I look like a dousch.

[SaabJohan]

Octane have noting to do with anything else than resistance to detonation.

Energy content is similar in all road fuel, if you're looking at the margins you will notice that premium gasoline has the highest energy content. 93 octane does however have i little higher density (usually because it contains more aromatics). The higher density will not cover up the lower energy content, but know we're talking about the margins. It can even differ more than that from tank to tank on a certain fuel.

Octane is a practical number from tests in the CFR test engine, higher octane = more resistant to detonation. This means that you with higher octane can use a leaner mixture, more advanced ignition, a higher compression ratio to mention a few things, all this can decrease fuel consumption.

Usually MBT ignition is detonation limited, so there are gains possible with high octane fuel. Keeping the engine stock won't do much anyway, unless the engine can adjust this itself.

[psychorallyfreak]

I would have to say that V-Power is just another excuse for them oil-hoarding bastards to charge more for a gallon of gas.
(No hostile intentions toward the oil companies, is there?)

[bjdm151]

I just checked and shell v-power is not currently listed as a top tier gasoline, only chevron, conoco/phillips, and quiktrip.