91 Octane versus 94

[allen]

I have a 2005 Acura TL which I run on 91 Octane. I was at a Sunoco station the other day and they have a 94 ocatane available. Would I see a noticeable difference in performamnce using the 94?

[The General]

This is always a tough subject.

What I can tell is that in the winter, you will most likely not notice any difference. In the summer, potentially your car will perform slightly better. This will only be true if you're a hard driver. If you like to cruise in a normal fashion, I would not bother with the extra cost.

[The General]

Anyone else have any clearer ideas or suggestions?

[KaPtNk]

Originally Posted by Road & Track

If it says premium, then engineers have calibrated the engine management to exploit this fuel's higher octane. True, if the engine is knock-sensor-equipped, lower octane fuel won't hurt it; it'll just run less efficiently, both in terms of power and economy.

If the the owner's manual recommends regular - and the engine exhibits no noticeable ping - then there's no benefit whatsoever in using a higher-octane fuel. No more power. No better economy.

[KaPtNk]

More info ...

http://tl.acurazine.com/forums/showthread.php?t=104380

http://tl.acurazine.com/forums/showthread.php?t=89432

http://tl.acurazine.com/forums/showthread.php?t=80062

Taken from the second link :

the short answer? Octane is a measure of how easily the fuel will combust in the engine. The lower the octane, the more easily it will ignite. If you run fuel that is too low, it's gonna go off to early because of the high pressure in these performance engines. You'll hear knocking, which will be a sign that the fuel is igniting too early. This affects performance and can damage the engine.

[SunnyDay]

Originally Posted by The General

Anyone else have any clearer ideas or suggestions?

I personal experience is that it feels more better with higher octane because the mileage is much better with a slight push of the pedal in highway thus it consumes less gas with higher mileage. With low octane, I need to push the gas a little bit harder to get my car going.
My conclusion:
Highway : High Octane
City : Low Octace

[amorak]

That's an onncorect assessment... It's what's called 'wishful thinking'

if you look at any scientific information, 91-vs 94 will do nothing for most cars, except those that 'REQUIRE' premium gas and have the capabilty to advance or redtard timing.

If your car requires REGULAR, you will notice zero difference in going to premium. if your car can run both, then you will notice no difference going from 91 to 94.

period.

[Al 1959]

Originally Posted by amorak

That's an onncorect assessment... It's what's called 'wishful thinking'

if you look at any scientific information, 91-vs 94 will do nothing for most cars, except those that 'REQUIRE' premium gas and have the capabilty to advance or redtard timing.

If your car requires REGULAR, you will notice zero difference in going to premium. if your car can run both, then you will notice no difference going from 91 to 94.

period.

He's right!!! :thumb:

Higher octane is for higher compression engine, what it does, it resists being ignated before the right time! meaning higher octane resists higher temperature before it ignates!
So if you need 87 Octane, don't waist your $$$ for 91 Octane and up.

Just my opinion.

Al.

[Huggyd]

Good post. guys

I was told the its best to run high octane for a week before going in to do any emissions testing? I'm not sure if this makes a difference but I have always done it, and I also STAY FAR AWAY FROM ESSO :!: Their gas is pure dirt!

where would one find info on specs for this, for new cars? looking at Rangers but I've never seem an info telling me weather I can advance or redtard timing or what fule to run?

[airbalancer]

Originally Posted by allen

I have a 2005 Acura TL which I run on 91 Octane. I was at a Sunoco station the other day and they have a 94 ocatane available. Would I see a noticeable difference in performamnce using the 94?

Give a try, when people go to track there car they will go will the higher rating.
What was the cost difference between the two.
We have no Sunoco station here