LongIslandLSE
Well-Known LVC Member
do all of you lse or v8 owners use 91 or 93 octane gas. What is your opinion on using regular or 89 instead???
v8 owners
- Thread starter LongIslandLSE
- Start date
EmpireSix
Well-Known LVC Member
I only use 93. 89 is for my 4 banger Honda (which I had to drive today because of all the dang snow)
Eric0508
Well-Known LVC Member
look at is this way: Usually 91 (93 in some places) is about 10 cents more expensive than 89. Over the course of 10 gallons, thats only $1 saved. To me its worth it to put in the right gas.
or you can look at it this way: $3.00 (for 89) / $3.10 (for 91) = 96.77%
so by buying 89, you're only saving about 3%. The difference always seems to be more because we never look at the dollar amount and always concentrate on the cents.
hope this helps
or you can look at it this way: $3.00 (for 89) / $3.10 (for 91) = 96.77%
so by buying 89, you're only saving about 3%. The difference always seems to be more because we never look at the dollar amount and always concentrate on the cents.
hope this helps
MMAFIGHTER121
Dedicated LVC Member
eric hit it. i run 93. even when i had cars requiring 89 now and then i'd bump it up to 91. if an engine recommends 91 use it unless you want to have it knock.
LongIslandLSE
Well-Known LVC Member
i typically use 93, 91 is hard to come by around me. I did use a lower grade few times and heard the difference in the engine, slight knocking I guess
NYC LS8
Dedicated LVC Member
93 here. The motor is too high a compression ratio to use anything below 91 octane.
You may be able to get some tunes for the car that will work with 89, but don't quote me on how the car would perform and run.
You may be able to get some tunes for the car that will work with 89, but don't quote me on how the car would perform and run.
Mine ran ok on 89 with a stock tune.
The ECM will adjust the timing for octane.
However with my SCT tune I run 93 only in the summer
and 91 occasionally in the winter. Here 93 is only 2 cents more than 91
so it's only like 35 cents difference on a full tank.
The ECM will adjust the timing for octane.
However with my SCT tune I run 93 only in the summer
and 91 occasionally in the winter. Here 93 is only 2 cents more than 91
so it's only like 35 cents difference on a full tank.
chriswells78
Well-Known LVC Member
Here we pretty much only have 87, 89 and 92-93 depending on the station. Sunoco's have 94 and i usually use it.
LongIslandLSE
Well-Known LVC Member
when i go to the right gas station its only about a 3 dollar difference from regular to 93. $3.40 for 93, mutha f in NY.
PatrickSimmons
Photographer
I only run 93. I'd rather be safe than sorry but one time I did have to put 89 in and I noticed it didn't run like normal till I ran it out and refueled on 93.
The ECU WILL NOT adjust timing for octane rating. This technology is just now coming out in new cars. What then ecu WILL do is retard the timing to a default "safe" zone in response to the knock sensor. It WILL NOT detune itself to match the grade of gasoline you run. Further, there is no amount of timing you can pull that will make an engine running the compression ratio of the LS's engines safe and efficient when fed 87 octane
Do not fool yourself, to run 87 or 89 octane in an engine running from 10.5:1 - 11:1 CR is simply stupid. You are asking for detonation and a hotter burn of the air-fuel mixture. Eventually this can result in costly engine damage.
Inverse to this, if your car calls for 87 octane, you're wasting your money and in-fact getting worse mileage by running 89, 91 or 93 octane. Octane is a rating of the stability of the fuel (anti-knock rating = rating of combustibility; higher the rating, less combustible, more stable). If the engine is not designed for or tuned for a higher octane rating, don't use it. Your engine will not burn the air-fuel mixture as well... your power will decrease and your mileage will decrease.
It's so simple; unless you've built the engine in your car (which I know most of you are not engine builders), or you've had the engine adjusted/modified... run only the grade of fuel your owners manual advises. Ask any engine builder/tuner.
One exception to running higher octane rating than required is at altitude. But typically this is advised in your owners manual. But the vast majority of people don't venture to altitudes requiring this
93 here . it is a big difference i had a altima 98 and the engine was kinda out of compression when i use 87 it knocked more than a band of rock so i changed to 93 and at least it did know but now lik a baby garage band. but now with ma LS hell na i go 93 all da way and if i dont have money to put gas id rather not take it out here in miami its like 20 cents more da diferencen between 87 and 93 and thingz are bad in here with money
NYC LS8
Dedicated LVC Member
Word, son.
ILLS
Dedicated LVC Member
Snowseeker
Well-Known LVC Member
Mine always got 87. Don't ever ever use the mid grade crap! Mid grade always has the most crap in it and sits in the tanks the longest.
Gas stations do not have a storage tank for midgrade. When you select midgrade at the pump, you get a mixture of premium and regular.
Jayce 1971
Active LVC Member
Depends where you live
Here on the high plains, you pretty much get 87, 89, 91. The 89 has a 10% ethanol blend, and is normally lower priced than the 87. The 91 is always 10-15 cent a gallon more, that's the price you pay for driving a high c/r vehicle. There isn't any reason, (if you really wanted to) not to add an octane booster to lower grade fuel. I carry 2 bottles in the trunk (cheap wal-mart $.99/bottle), because over half the stations where I live don't carry any fuel over 89. 3/4 of vehicles on the roads here are Chevy trucks, and they don't care what kind of fuel they get!
Here on the high plains, you pretty much get 87, 89, 91. The 89 has a 10% ethanol blend, and is normally lower priced than the 87. The 91 is always 10-15 cent a gallon more, that's the price you pay for driving a high c/r vehicle. There isn't any reason, (if you really wanted to) not to add an octane booster to lower grade fuel. I carry 2 bottles in the trunk (cheap wal-mart $.99/bottle), because over half the stations where I live don't carry any fuel over 89. 3/4 of vehicles on the roads here are Chevy trucks, and they don't care what kind of fuel they get!