V6 on 87 octane

[jd10013]

Originally Posted by irocnroll

Placebo effect.

no, it does run differently. how much is a matter of debate though. but any high compression motor will benefit from a higher octane.

[jrisebo]

Originally Posted by jd10013

no, it does run differently. how much is a matter of debate though. but any high compression motor will benefit from a higher octane.

Thats what I understood too, but I guess we are outnumbered by others.

[Goldknight]

Originally Posted by Blue Demon

Premium cheaper than regular? Sounds fishy.

I would guess ethanol blend. All 89 here in Iowa is the cheapest because it's all 10% blend.

[SPARTAN sui]

Originally Posted by jrisebo

Why not always get premium at a cheaper price....would make sense.

Yeah, it's about $1.50 difference if I put 15 gallons in. I'm just use to putting 87 in since that's what the manual says it should run on. I might give 89 a whirl and see if I notice any difference. However I'm going to take a look and see if the 87 is blended. I'm pretty positive the 89 is blended with ethanol, maybe that's why it's cheaper?

Either way gas is too damn high in my neck of the woods. Glad I don't have to commute far!

[crateish]

I run 87, but top off the tank with a little Everclear.

Nets me about 103 octane.






I am soooooo sirius.



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[Gruv3451]

Originally Posted by crateish

I run 87, but top off the tank with a little Everclear.

Nets me about 103 octane.






I am soooooo sirius.



---

[SC2150]

Originally Posted by Jonster

I was under the impression that the higher octanes only make a difference if you are really driving the car hard. (and also helps lengthen engine lifespan)

edit: Obviously putting 91 in SS/ZL1 minimum and 87 in LS/LT minimum

There are also many other factors when fueling up like brand and region. There are some articles on Shell V-power vs BP ultimate, but gas is different based upon region as well.

(Not sure if this helps, just spitting out some knowledge)

At any driving......we see this while logging these cars for tuning. The amount of timing retart due to spark knock (detonation).

Originally Posted by Dave McFly

I don't get it how can my dad who has the same DI 3.6 V6 the Camaro has in his '12 Impala can run 87 but the Camaro has to have 93?

The owners manual for all, including the caddys and the buicks say 87, but that is for marketing only. You can run 87 just fine as the ECU/PCM pulls timing, but you wont ne running at optimine.

Originally Posted by Frank in MD

Not on a V6. V6 was designed to run regular unleaded gas. Premium on the 6'er is pointless.

Your talking with a few of us here that tune, build, mod, and build/rebuild these motors constantly....and are the leaders in product R&D and I can attest, any motor with 11:1 cr or above runs better, delivers more power, and better fuel economy on 921-93 than 87.

Originally Posted by turboguy327

The camaro required 87 minimum. It runs better on 93. Just like your dads car.

True and accurate.

Originally Posted by GretchenGotGrowl

Do you have some evidence that is counter to the evidence many of have seen on the dyno and street logging the timing?

Agree 100%. Not many have done as much as far as understanding these engines in every aspect, and gretch has the cashed checks & receipts to prove it.

Originally Posted by irocnroll

Placebo effect.

I dont think the dynos #'s , and the tuning logs fall under placebo...

Originally Posted by crateish

I run 87, but top off the tank with a little Everclear.

Nets me about 103 octane.






I am soooooo sirius.



---

OK, Everclear is for your consumption, not the cars!!

[terry_b]

93 is a definite bump for mpg. At least 2-3 on highway driving.

[SS785]

I always used 91-93 too (LLT). I tried 87 a couple of times and the car didn't run as smoothly. The difference was very obvious. Much more noticeable than let's say, a ported TB, so no placebo here.

[IrocJack]

http://www.nicoclub.com/archives/gas...ane-myths.html

[trans665]

Originally Posted by SPARTAN sui

I actually might switch over to premium grade because it's always seems to be $0.10 cheaper than regular. Which isn't saying much when it's $4.40 versus $4.50 :(

4.50 a gallon for reg.........wow........ i get my super for 3.12

[yellowrs]

Originally Posted by jrisebo

This weekend I did a 500 mile round trip drive. Decided to try 87 octane (it was 40 cents cheaper at the station I was at). Well, After pretty much always using 93 octane, I can honestly say that using 87 octane DOES effect the perfomance of my car. It just seemed to run a bit rough, and certainly lacked a bit of pep when passing on highway speeds. Perhaps its a placebo effect since its my car, but im going back to 93 octane.

93 always will make your car run smoother!

[911medic]

Originally Posted by IrocJack

http://www.nicoclub.com/archives/gas...ane-myths.html

Nothing on that Web page contradicts what is being said in this thread by GretchenGotGrowl/SC2150 and others.

The explanation of what octane does (reduce detonation/knock) is right in line with what they're saying. Any increase in power/MPG is because the ECM doesn't have to adjust for detonation by pulling timing, resulting in more efficient combustion with the higher octane fuels.

[cadyshac]

So if I start running 93 octane in my LFX do I need to do a fuse pull or something to reset the ECM (like the fuse pull in the SS)????