VET4LES

Z06LUST

Why???????????????
None are best and none needed.

MikeyTX

mattcgoldstein

Thanks all, I think the cop video was the best post of them all!

bigred6906

Whoever puts 87/89 into their vette while having 91/93 available is a cheap ***.

WMark

This comes up so friggin' often, OP, do a SEARCH!! You will get the same BS, but would save a lot of clicks. But you have sucked me in...

Unless you believe there is a conspiracy between the car and oil companies, there is a reason the auto manufacturers dictate the octane rating suggested for your vehicle. It WILL FRIGGIN' RUN BETTER AND MORE EFFICIENTLY!!" And, WITH MORE FRIGGIN' POWER!

Plus, you buy a $50k to $70k sports car, and you are worried about a dime a gallon!? And, you are driving one of the most effecient MPG performance cars on the planet. C6 in the mid to upper 20's on the highway. On Premium!

Sorry to other posters, but I ignore, "My car runs fine on low octane pig sh#t gas." No offense, but I'm guessing garage queens, or few long haul road trips.

Sorry for the rant, but couldn't resist.

MikeyTX

Well said ! I firmly believe that some say they run 87 just to start sh*t .........

SG4206

For what it's worth - mixing regular and super 50/50 will normally promote more power than each of the octanes standing alone. I have proven this many times on an engine dyno with 10:1 compression engines. The specfic gravity increases , allowing leaner jets and more timing.

So - on your next empty tank , fill up half and half.

Street Rat

If you can't hear the knocking then your stereo is turned up too loud. Use what is recommended by the factory.

MikeyTX

"I hear ya knock'n ........... But ya can't come in ........"

hig4s

With pump gas,, race gas is a different animal, the lowest octane that does not cause pre-ignition, or cause the computer to retard timing will create the most horse power.

If you are mixing 87 and 93 50/50 the octane would be about 90, seeing the engine calls for 91 you are probably getting it pretty close to optimum for the engine.

sportcruiser

... and reduce power. Doesn't make any since to buy a performance car, add performance exhaust and then introduce lower octane fuel that forces the computer to detune the engine to protect it. The lower octane will not hurt your engine because the computer won't let it, but you will lose horsepower. To each his own, but whatever you do, don't do mods to increase performance and then cancel it out with lower octane!

z28lt1

First off, I run premium (usually 93 here) exclusively in the C6 because I paid for 436 horsepower, and I want all of them. For ME, I totally agree that saving money on gas on an expensive car doesn't make much sense.

That said, people who use a lower octane probably do really have their car run fine. It's designed to run "fine" on lower octane, that's why they say it is okay to use. Also, while in theory reduced timing could alter gas mileage, in many modern cars it seems to not be a noticeable change either way. I've done a few highways test in the daily driver just to see, and no change. That said, the daily driver gets premium as well outside of that trial, I want all the horsepower I paid for in that car as well.

I think we can only conclusively say you will lose power with a lower octane, and on a day to day basis, most people can't notice the difference between 430 and 420 horsepower anyway. I wouldn't see why we say it would be more efficient or "better", at least not without some real evidence.

last901

I've used the lower octane (reg unleaded) a couple of times with no significant loss or performance.

I tend to always use the highest octane premium though. After all, if I'm going to avoid being seen in a car I can actually afford, I might as well avoid being seen pumping low octane fuel at the local 7-11 as well.

It's largely a self-esteem issue I think.

topper7788

It took a long time till someone finally said it, thanks for the laugh...

These are like Zaino threads, a total waste of time, guys who run regular aren't going to change and guys that run premium are going to anyway because they honestly believe they would hurt there beloved cars if they did not ( you won't by the way)

How many posts till this thread dies 100?

And when will It reappear, oh, about a week to 10 day...

wolfdogs

good vid!!! bully for that officer too!

wolfdogs

reminds me too of the posts that asks "whats the cheapest tire out there I can get........"

come on..

I was a United States Racquet Stringers Association certified stringer for years.. ran the business in the bottom of my house... somebody would show up after just spending 150 - 200 bucks on a new racket.... then "whats your cheapest string?"................. hey... LOL!!!! like a car with tires, that racket is only going to play as well as the strings allow it...

Sabre34

I don't understand why someone would pay for a high performance/premium car that recommends premium gas and then opts to save a buck or two by putting regular in the tank.

last901

Okay, okay... wait a minute..... just a sec........... hold on...

okay, I'm over it now. Well, except for the obvious question as to who the... okay, hold on.... Racquet Stringers Association.. wait....wait....

okay, I'm done again. Who did you guys hire to handle crowd control at your conventions?

I'm so ashamed at myself....

Thanks, I needed that.

Point well taken though.

Somehow I just wonder what my grandkids might think as they sat on Gramma's lap and asked what Grumpa did during the war in Iraq and she told them that he was a certified raquet stringer. God help me... wait wait....wait... I know this isn't as funny as i'm making it out to be. I'm so sorry....

Forgive me... it's just... well forget it.

I think I'll erase this. As soon as I catch my breath.....

Please please, any moderator reading this thread, please feel free to banish me to someplace where they don't play tennis... Please... hurry

j_digi454

My exact point in post #19. I'm still shaking my head. It has nothing to do with whether you could cause damage but the mindset totally bewilders me.