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Old 10-23-2010, 01:22 PM   #1
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So I put super gas in my v6 for the first time

Well I've owned my car for 1 year now almost 7 thousand miles on it. Since the first fill it's always been the manual recommended regular gas. I always got my gas from 1 BP station for some reason, I'm afraid of shady stations putting water in the tank. Well the other day I desperately need gas and couldn't make ir to my usual staion so I went to a crappy one and got super instead. Maybe I'm crazy but I feel a difference. The car feels smoother in general especially at high rpms. I feel a little more power too chirping the gears and burning out in second gear never felt so fierce as now, so I'm wondering if it's my imagination or even though it's not recommended super makes my car feel better. Has anyone else had this experience? Also is there any way I'm doing damage using super?
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Old 10-23-2010, 01:28 PM   #2
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My local performance shop does a lot of Camaros and told me to use super in my v6, said I would notice slight performance gains. The computer is able to detect super v. regular and adjusts the timing etc accordingly.
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Old 10-23-2010, 01:33 PM   #3
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Yea I noticed them plus so much smoother taking off and switching from 1st to second, it felt like it feels when you change the oil after a few thousand miles
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Old 10-23-2010, 01:39 PM   #4
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does it does it damage the car if you keep useing super
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Old 10-23-2010, 01:44 PM   #5
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20K+ miles on mine and I use nothing but 91+.
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Old 10-23-2010, 01:46 PM   #6
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Quote:
Originally Posted by rallyrob View Post
does it does it damage the car if you keep useing super
no
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Old 10-23-2010, 02:09 PM   #7
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Put solid rocket fuel into the tank.
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Old 10-23-2010, 02:10 PM   #8
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After you use super, do you have to keep using it? Can you go back to regular?
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Old 10-23-2010, 02:11 PM   #9
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Quote:
Originally Posted by camaroitalia View Post
After you use super, do you have to keep using it? Can you go back to regular?
you can switch back and forth with no issue...
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Old 10-23-2010, 02:24 PM   #10
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Quote:
Originally Posted by camaroitalia View Post
After you use super, do you have to keep using it? Can you go back to regular?

You can switch back and forth but it's not good to have both in the tank. So don't put regular in if you have half a tank of super.
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Old 10-23-2010, 02:37 PM   #11
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I'd run 91 if gas wasn't so goddamn expensive. My friends in the USA, you have no idea what high gas prices are. We pay through the nose in Canada.
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Old 10-23-2010, 02:39 PM   #12
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Quote:
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does it does it damage the car if you keep useing super
NO. The higher the octane rating, the better your car will perform. End of story.
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Old 10-23-2010, 03:35 PM   #13
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How can you not let the two gases mix? Like how do you drain the gas all the way? lol or just fill it back up when its really low?
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Old 10-23-2010, 04:00 PM   #14
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Quote:
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How can you not let the two gases mix? Like how do you drain the gas all the way? lol or just fill it back up when its really low?
It doesn't have to be empty by any means, just not half and half or something. If your going to switch back to regular run it to 1/4 tank or so.
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Old 10-23-2010, 04:02 PM   #15
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lol you guys are funny

87 octane. that is what the engine takes. you're just wasting your money otherwise. i was skeptical but even the guys at chevy confirmed it.

"oh i swear it feels faster" please. it's all mental. it's like when people drink a buncha beers and start acting all drunk, until somebody informs them it was non-alcoholic.
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Old 10-23-2010, 04:12 PM   #16
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"oh i swear it feels faster" please. it's all mental. it's like when people drink a buncha beers and start acting all drunk, until somebody informs them it was non-alcoholic.
Haha..."placebo effect", is the clinical term. I'll stick with 87, I'm sure the placebo effect is worth it but I'll save some $$$.
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Old 10-23-2010, 04:18 PM   #17
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Heh. My car does run better with premium...

One Example: On an uphill grade, under light acceleration, low-octane fuel causes surging. Premium eliminates that.

The bad thing is that it did nothing for my quarter time.
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Old 10-23-2010, 05:18 PM   #18
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Quote:
Originally Posted by Murph0408 View Post
lol you guys are funny

87 octane. that is what the engine takes. you're just wasting your money otherwise. i was skeptical but even the guys at chevy confirmed it.

"oh i swear it feels faster" please. it's all mental. it's like when people drink a buncha beers and start acting all drunk, until somebody informs them it was non-alcoholic.


it is a waste to use higher than 87. It is all a mental thing like he said. Like how you feel after you wash your car or put a nice coat of wax on it, or after an oil change. Somehow it feels faster.
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Old 10-23-2010, 05:24 PM   #19
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If you use 89 oct...and 1/2 92 octane...it will equal out to approx 1/2 lets say 90..for agruments sake...so you can mix and match.
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Old 10-23-2010, 05:42 PM   #20
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If you use a single nozzle dispenser the middle grade is mixed in the dispenser. 50% high octane and 50% low octane. So mixing it in your tank is immaterial.
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Old 10-23-2010, 05:52 PM   #21
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This subject has been beaten to death...

The ECU in the LLT is "over-sparked" and relies on the knock sensors to pull the timing back. This is very obvious in my data logs. With 87 octane the knock sensors are VERY ACTIVE! Check the video and watch the bottom right corner which is "Spark Retard" from the knock sensors:




When I run 93 octane the knock sensor are almost totally inactive! Spark Retard is almost constantly 0! So with 93 octane I'm running more timing which mean more power... And in fact we had one guy here with a shop that actually tested this on his dyno and showed that higher octane did make more power... The ECU basically adapts to the higher octane by constantly trying to add more timing until the knock sensors kick in...

at this point either you believe it or you don't... I've seen the data logs...
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Old 10-23-2010, 06:03 PM   #22
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Faster no. Smoother yes. your engine will perform better with higher octane every time. performance encompasses more than just HP...
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Old 10-23-2010, 06:05 PM   #23
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and it will be beaten to death some more. Just the nature of forums....one side believes one thing, the other side believes another, the middle side gets a dashhawk. I had one of those things on my EVO when I still had it....trapped at 12.66 but the hawk said 11.33 or something like that. Bunch of my Honda lovin friends loved it though. Saved them thousands on expensive mods they didnt need. The hawk drops your time in an instant. But it is good for monitoring stuff.
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Old 10-23-2010, 06:07 PM   #24
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Don't know about making car faster but I used 91 awhile back when I had the Airaid V1 which leaned the car and is said to pull timing from the leaning out, and basically ran worse then stock. The 91 gave it more throttle response and smoother, guess helped restore some of the lost timing from the Airaid. Now with the car broken in and the mods I have I have switched back and forth to see if noticable and really can't tell, maybe just a bit smoother. The biggest change came when I changed brands of 91,I was using Shell near my house but switched to a Chevron further away and that was noticable! I guess that particular Shell just had worse quality gas is all, and cost more too! Next time I will try the 87 from Chevron to see if any different and will report in. one thing I have noticed as well is that I have less soot in the tail pipes from the Chevron which is good.
Performance wise the car runs great. Today with the second tank of Chevron in we went to the beach for our walk and there is a section of PCH we make a u turn on to get to where we park. The road is a 60 zone, so as I make the turn, slow to a stop and in sport mode stand on it through 73 before letting off the gas, only place I can even do that. What I noticed for the first time is 1-2 shift was a bit firmer and 2-3 shift was nice and firm, more then usual as if there was a shift kit in! felt great! Car hits about 63 then shifts to 3rd and 73 comes up really fast.
I don't know if it was the gas or cooler, damp air or both but the car seems to like it. Will see if it continues after the 87 goes in.

FYI there are dyno runs from a shop in VA who tested the 87 vs 93 in hot weather I think in Aug, and the car made more low to mid range power and some on top to on the 2nd, cooler run. Might check it out for whait it's worth.
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Old 10-23-2010, 06:07 PM   #25
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You're all wasting your money... GM engineers did not design your car for 91,93 etc...
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