Shhhhh, We're out of premium

[Bobaloo]

Hey fellas what is the name of this octane booster mentioned and where can I buy it. I'll put it in with my Shell 91. I remember in the 60s when Clark Super 100 WAS 100 octane but.......those were the days my friends, those were the days.

[slick rick]

Originally Posted by mikeyg36

Then what's the point of the fuse pull

To reset it manually without having to wait for the ECM to eventually do it

[mikeyg36]

Originally Posted by slick rick

To reset it manually without having to wait for the ECM to eventually do it

Gotcha

[tonyko1]

The fuse pull thing is this website's urban legend myth. It is the classic placebo test case.

I did the fuse pull 2x, once when I first read about it and figured the dlr filled it with regular. I didn't detect any difference. So I purposely ran 87 through 3 tankfuls. By middle of the 2nd tank I could tell a difference in performance. So then I went back to 91 octane on the first fill up, then 92 for the next two fillups. Car went back to normal "bad ass" performance.

There is a very long string about how the fuse routing shows that the 5 20 fuse pull doesn't work. I only did a year of electronics and can't read schematics anymore, so I took it to a genuine Electrical Engineer who knows nothing of this ongoing debate. But he could say without doubt that the schematics and hence the routing of the electric current wouldn't matter "squat" if you pulled said fuses, for a moment or overnight which is the current buzz on this myth.

But hey, if it makes you feel the car drives better, then, better. But consider this: If you are putting 91 octane in your car for a while, and then you start putting in 93, do you need to again do another fuse pull?....

Sorry, I can't resist the art of rhetoric.....and I am leaving this door open for you. I aint responding back to your rants because of my 2 week ban "For crapping on the thread" by the guy with the smoking monkey.

Best, and peace out.

[christianchevell]

the octane boosters are varied brands and able to be bought at almost all auto parts stores...........

[C586]

Read labels on octane boosters. They increase octane by .01 or something stupid like that. They are a waste of money.

[San2cci]

For anyone NJ, PA, VA, Fl residents with Wawa gas stations near them; they have great gas. They are actually higher grades then what they advertise...so use there gas if you are able too. Plus, they would never pull a stunt like this!

I suggest not using corner gas stations too because around my way they have been caught watering down there gas.

[IndeedSS1]

Originally Posted by SS11

Stopped to get gas at my local Valero this morning. Went in since I had to get a couple other things and prepaid for the gas. While pumping (premium of course) I notice a post-it on the pump near the card swiper that they are out of premium. What the hell is pumping through the premium nozzle then? By the time I noticed the tank was nearly full. I went in and told them they should have bags on the premium nozzles and need much bigger signs. They asked if I wanted the $1.30 difference in price refunded. I told them that wasn't the point but stopped short of explaining why since I figured they really didn't care anyway.

Guess I get to try the fuse pull after this tank but really it's quite a shame that a $40k car is permanently degraded performance-wise by running 87 octane just once without knowing the little fuse pull trick.

Come on GM. How hard can it be to automatically set the timing tables back to normal after a certain period of time or certain number of miles?

And how the hell is it legal to pump 87 through a 91 pump? </rant>

First of all, the pump labeled 93 wasn't pumping anything other than the 93 from the bottom of the tank. Second I used a scanner, intentionally put in 87 when the tank was almost empty, monitored the Knock and Knock Learn Factor, when the 87 ran out filled up with 93 and repeated the scanning.

The ECM references both tables. When 87 octane was introduced the percentage that the low table was being referenced increased. Once 93 was back in the tank the percentage of referencing the high octane table went back to 100% over a fairly short period of time. This was on the LS3. I'm unsure if the L99 will relearn or if it does it just takes a really long time and why GM has the TSB only covering Camaros with AFM.

[JohnnyBfromPeoria]

How do you "water down gas?" Do you have to stir it really, really fast? Because they do not mix.

John B.

[SlingShot]

There are two different types of pumps used. There is a straight metering pump and a blend metering pump. The pumps with a different nozzle for each octane is a straight meter pump. With a straight meter pump the tanks are filled with each octane sold. On a blend meter pump there is one nozzle with multiple octane selection buttons. The tanks are filled with the lowest and highest octane being sold. If you select either the low or high octane the pump will meter straight. If you select a mid grade the pump will pull from both tanks and blend the octane you selected.

The OP has nothing to worry about, he got the octane he selected.

[MYDLIFECRISIS]

Originally Posted by JohnnyBfromPeoria

How do you "water down gas?" Do you have to stir it really, really fast? Because they do not mix.

John B.

[ebaugh1990]

Originally Posted by C586

If a station sells anything above 91 octane like 93 then they mix 87 or 89 with the 93 to get 91. So it's possible he got 87 or 89 in full without the other mix octane. Most stations only have the lowest and highest in their tanks and mix to get the others.

To the OP. Valero is a watered down gas anyway. I wouldn't go anywhere but Sunoco for fuel. In my area I have found its the only 93 that my supra won't knock on under high boost. It's the fuel I tell everyone to run. It's proven to be the best in my area. Possibly different in your area. Valero fuel is just as horrible as delta sonic gas. It's so watered down your mileage drops 3-4 mpg over the course of a tank with delta sonic fuel.

I hear ya, yeah I think there has to be a good reason why Sunoco is sponsored in NASCAR lol

[ebaugh1990]

Originally Posted by Bobaloo

Hey fellas what is the name of this octane booster mentioned and where can I buy it. I'll put it in with my Shell 91. I remember in the 60s when Clark Super 100 WAS 100 octane but.......those were the days my friends, those were the days.

I used to use "octane boost 104". They advertised an 11 octane rating increase if used properly. So with 93 it would make your fuel 104. All I ever noticed was my exhaust smelled more rich, and my engine idled smoother

[C586]

Originally Posted by JohnnyBfromPeoria

How do you "water down gas?" Do you have to stir it really, really fast? Because they do not mix.

John B.

Ethanol. The more ethanol the more worthless the fuel is. They are allowed 10% by law. They can be lower though. The more ethanol the more the fuel is watered down. I thought this was common knowledge?? The higher % the worse mpg. They use it to increase the octane rating instead of other more expensive chemicals. That's why some fuel is more expensive than others.