91 Octane a Must?

[2SSRS@Gen5diy]

Where do we get 93 out here ?
I am only 2 hr drive from you.

[PoorMansCamaro]

^You can't. I was just saying in general. i wouldn't mind seeing 91 dyno'd, but i was just saying the lowest grade possible vs highest grade. when i say highest grade, i mean not race gas and the most common you can buy. lol

[2SSRS@Gen5diy]

Originally Posted by jtzako

Lower performance is one issue, but not a major one for a daily driver. If you dont lose MPG by using lower octane, and it doesnt damage the engine (it shouldnt since the ECU compensates) then do what your pocketbook wants.

I currently only use 93 octane but if I was in a situation where that $7 a tank would make a difference I would use 87 for a while.

First off it has noting to do with by pocketbook i have no payments at all....

Its more to do with me thinking prove it to me first, And no one has, On my boat was told the same thing run only 91 on the 502 EFI i did not, i ran only 87 and never lost a race, So if you want to tell me to run 91, I need to see it that's how i run.

[2SSRS@Gen5diy]

Originally Posted by PoorMansCamaro

^You can't. I was just saying in general. i wouldn't mind seeing 91 dyno'd, but i was just saying the lowest grade possible vs highest grade. when i say highest grade, i mean not race gas and the most common you can buy. lol

We may do that some day.

[jtzako]

Originally Posted by 2SSRS

First off it has noting to do with by pocketbook i have no payments at all....

Its more to do with me thinking prove it to me first, And no one has, On my boat was told the same thing run only 91 on the 502 EFI i did not, i ran only 87 and never lost a race, So if you want to tell me to run 91, I need to see it that's how i run.

All I can say is that each car is different. When I got mine brand new it was filled with 87 octane and felt a bit sluggish. Once I got that cleared out of the system (with 93 octane) and did the fuse pull to reset the ECU it woke the car up and I can definitely dell the difference. If I can feel it, there must be an effect on 0-60 times etc.

[2SSRS@Gen5diy]

Happy for you, do what works for you, that's what is so good in the USA we all do what is good for us.

[irocnroll]

Originally Posted by mikeSS

i dont understand why people all ways ask if some one has a SS or lt when its in there info .... by to answer your question you get better MPG with 91... for years people have thought to put cheaper gas in there car when the car say premium only. but when you put the wrong gas in you could get worst mpg and loss a little hp and over years could cause more damage to ur car

bottom use 91 in cally you cant get 93, but i use 93

That is a false statement. There is no increase in MPG with different octane levels. The only difference in Octane levels is the speed at which the gas burns. And the only advantage to a faster or slower burning octane is if you have pinging or knocking problems with your engine. You are throwing money away every time you fill up if you aren't having pinging or knocking problems with your car running it at 87 octane.

[2SSRS@Gen5diy]

Wow you get it, So with 87 the gas burns faster that's why it will pull some timing as it need to ignite closer to TDC of the stroke.

[MontyCarlo]

The SS has been measured and proven to lose power when burning 87 instead of 91 or 93. It's a fact. If you can't feel a difference, that's due to your butt dyno not being sensitive enough.

[sninja13]

Here it is straight from the owner's manual:
-----------------------------------------
Recommended Fuel
If the vehicle has the 3.6L V6 engine
(VIN Code V), use regular unleaded
gasoline with a posted octane rating
of 87 or higher. If the octane rating is
less than 87, you might notice an
audible knocking noise when you
drive, commonly referred to as spark
knock. If this occurs, use a gasoline
rated at 87 octane or higher as soon
as possible. If you are using gasoline
rated at 87 octane or higher and you
hear heavy knocking, the engine
needs service.
If the vehicle has the 6.2L V8 engine
(VIN Code W) or the 6.2L V8 engine
(VIN Code J), use premium unleaded
gasoline with a posted octane
rating of 91 or higher. For best
performance, use premium unleaded
gasoline with a posted octane
rating of 93. You can also use
regular unleaded gasoline rated at
87 octane or higher, but the vehicle’s
acceleration could be slightly
reduced, and you might notice a
slight audible knocking noise,
commonly referred to as a spark
knock. If the octane is less than 87,
you might notice a heavy knocking
noise when you drive. If this occurs,
use a gasoline rated at 87 octane
or higher as soon as possible.
Otherwise, you could damage the
engine. If you are using gasoline
rated at 87 octane or higher and you
hear heavy knocking, the engine
needs service.

[Xander]

My SS/RS with a tune only gets 93

[sninja13]

I only use 93 as well. The whole "could damage you engine" and "loss of performance" make me very particular about that.

I do understand that it says below 87.

[2SSRS@Gen5diy]

Originally Posted by MontyCarlo

The SS has been measured and proven to lose power when burning 87 instead of 91 or 93. It's a fact. If you can't feel a difference, that's due to your butt dyno not being sensitive enough.

Please post the link to the proven lose of power running 87

[MontyCarlo]

Search "fuse pull" and take your pick of the dozens of different threads about significant power loss from 87 octane.

Heck, you said yourself that you know it causes the engine to pull its timing - that's something that will ALWAYS cost you power as a direct & unavoidable effect.