Nrod18

Does anybody know if the 2006 GTO's can be used w/ 89 octane...or anything lower than premium? thanks

KrautBurner

iTrader: (5)

91oct "Recomended"

the owners manual (for the 2005 ls2) says you can run regular, but you may not get optimal performance.

it will automaticly pull timing (from what I understand)
but it is safe

CSiJason

In cooler weather it might be somewhat safer to run lower octane but in the summer I wouldnt run less than 91. Becides, that saves you what $2 per tank vs mid grade? That is probably no more than $100 or $150 a year assuming you fill up about once a week.

The owners manual suggests 93 octane but in many areas 91 is the best you can get. I wouldnt put anything lower than 89 in it unless it was an emergency and thats all I could get. I pass stations that dont have at least 91.

Crisisman

iTrader: (1)

When I first got mine I tried a tank of 87 just to see what difference it made. I could definitely feel the loss of power and lost about 10% in fuel economy, which actually makes it MORE expensive to run because you're burning more 87 per mile than the difference in price. So, I went back to 91 and have never looked back.

DrEvyl

iTrader: (5)

Er, 92.

The dealer I bought my car from filled it up with 87 before they gave it to me... I wish I could have talked them out of it, but they did it before I even knew it was happening. Car ran fine, but yeah, it got about 2-3 mpg less than it does now. Took me a while to work that tank of gas out of it the car.

CSiJason

Funny you mention that, I used to be able to get 93 at the station near my old house. Now I can only get 91 or 92 near where I live now (mostly 91) and my mileage has gone down about 10% or more.

Dave68RT

iTrader: (3)

isn't v-power from shell 93 or higher?

Crisisman

iTrader: (1)

It depends on your state regulations. Here is WA it's 92(as DrEvyl clarified). Many states I've driven through only offer 91. I can't remember the last time/place I've actually seen 93 at a pump.

SRT03

iTrader: (1)

I wish we had 93 here. That would be awsome!!

GTO1_OHIO

iTrader: (3)

I use Sunoco 93 octane ... other cheaper brands like Citco 93 cause me problems. Track days I use Sunoco 94 octane...that'll be Monday

05_GTO

Just use the 91. It's only a $1.80 more per tank than the 89 and $3.60 more per tank than the 87. If you are worried about that much money "per tank compleat fill up" than why did you buy a sports car? IMO

05gto60

iTrader: (3)

exactly.

ive only used 89 ONCE, and it was cause the station didnt have 91, and it was gonna get used anyways since it was on my way back to AZ from CA. my car has never seen anything less since

Bring the Noise

BP/Amco 93 Octane here in Memphis.

SuperChevy's this weekend... I wonder if I'll stay awake long enough to go over.