Damn...41 posts on this subject?

 

42

I had to,

 

This has been very entertaining. If you can afford a Corvette, you can afford the 93 gas. In addition to our Corvette, we have a 2023 GR86 with that little Boxer engine. Fun car! On the gas door it says 93 octane. Do the right thing. Your engine will thank you! Drive it like you stole it!

 

I have an idea, let’s start piling on!

 

Yes, you have to run premium. Always! Especially since yours is supercharged. You have to think about it this way, do you really want to risk damaging something in your motor, just so you can save a few bucks? Maybe shop at a grocery store where you earn points towards money off per gallon 🤷‍♂️. Is this a joke lol.

 

Paid $3.34 for top tier 93 at Costco today

 

I paid 3.78 for ethanol free gas. But only 91 octane. Cannot get 93 here. I have to add octane booster or the car pings. Adds another $10 per tankful..Found one place selling 94 octane at $6.99 a gallon. Maybe mix it half and half with 91 octane?

 

To buy a car like this and then think about cheapening out on premium fuel to save a few bucks is ridiculous

 

Room for 1 more?

 

Such a simple question with so many responses. With 93 octane being the overwhelming answer, I think we need to get to 93 posts in this thread just to make sure.

 

If this thread makes it to 100 posts, I vote we STICKY it!

 

Out here on the West coast, I can only find 91 octane, 92 & 93 are for the other lucky states. My LS3 runs fine on 91, never tried the lower grades.
(Are we getting closer to 100 Posts?)

 

At about 20 psi boost and 735whp I like to run 93 with a 32oz can of Boostane Professional which brings 17.5 gallons of 93 octane up to 102 octane. At $25 a can and $4.00 a gallon for 93 octane it works out to be $5.50/gal. It would bring 91 octane up to 100 octane using the same amount. It's good stuff.

I also like to run pump E-85 which REALLY wakes this Blue Devil up!....and it's only $3.09/gal.

P.S. Post #53!

 

So, if you run regular in your supercharged Vette, does it make a difference if it's with an M6 or A6 transmission?

 

The engine could grenade either way. I think it would be more exciting when it blows with a manual. He could take it to redline and always remember the gear he was in when the engine blows. With an A6 he'd just be guessing the gear.

I always run 93 in my 2013 GS. It's manual btw.

 

For those that add octane booster...are you careful how much you put in and to which tank it goes into?

(Post number 56)

 

Not really. I’ve run octanium in a pinch when I couldn’t get race gas. Typically a can treats a whole tank.
Id run my same 100 octane tune on that as I would with airplane fuel in my GT500. No issues at all and I was kind of pushing the envelope of pump gas

 

That's not what I'm referring to...The C6s have (2) 9 gallon tanks If you just pour the booster in it will likely all go into one or the other but not both equally.

 

I recognize that this thread has mostly drifted into having fun with a question that was answered a long time ago, and I am not trying to break that up. But to whatever extent anyone is interested in facts as they relate to a car in routine street use, neither avgas nor octane boosters are wise. Most avgas has low but not zero lead, which is both illegal on the street and will quickly poison cats.

As far as octane boosters, the only two known, semi-legal compounds that can boost a tank of gas by several numbers by adding a small can are MMT and aniline. I say semi-legal because some states outlaw them, and they both will void virtually all manufacturer and extended warranties.

MMT is a manganese compound, which like lead, does not vaporize in the combustion chamber. It exits the engine as extremely small, but fully solid metal particles that plug the pores in cats. MMT isn’t as bad as lead, but despite claims of MMT marketers, it is clearly not harmless over the long term. As far as I know, aniline doesn’t harm cats, but it is extremely corrosive to fuel system components like fuel pumps, lines, and injectors.

For those who want to use octane boosters in highly tuned, mega-horsepower engines on the track, where there are no cats for MMT to poison, and don’t drive enough miles to start worrying much about aniline’s fuel system corrosion, octane boosters do the job with fairly low risk to that kind of service. But if you are thinking about running the car for 50,000 miles on the street over a number of years, they are definitely not wise.

 

If a train leaves Chicago at 4:35pm....