After putting v-power
#42
more octane wont make a normally aspirated car develop more HP
If you have a turbo or SC then the higher octane is put to use with its additional pre-ignition/detonation additives
gas starts the same then things are added to it to raise the octane number- they do specific things
If you have a turbo or SC then the higher octane is put to use with its additional pre-ignition/detonation additives
gas starts the same then things are added to it to raise the octane number- they do specific things
#43
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is that the right way to re set the ecu? i think last time i think i did it i held the brake down for a min.. also if i re set my ecu how many mph should i hit b4 i slow down so the ecu can change?
#45
Registered Member
Makes sense. Thanks. But, it brings up something else. I disconnected my battery to remove it when installing my CAI. When everything was reconnected I had to provide the radio and nav codes but, I didn't lose my presets or memory settings, etc. How's that possible? The battery was out of the car for a few hours while I did the install and some other things.
#46
Registered Member
the car learns how you drive and then sets the proper shift points and stuff based throttle position and what not. Like if you drive like a grandma all the time it will shift early and not have power, even with the throttle all the way down. If you drive like speed racer, the car will downshift as soon as you touch the throttle. That info was intended for a person who wanted their car to not be in grandma mode. I suggest you drive like you normally do.
As for resetting the ECU, there are several ways to do this. One has been somewhat outlined by the OP. Another is to remove a battery cable for a bit, then reconnect and drive the car. In the 80's, this is exactly what was done for the '87-'88 Mustangs at drag strips. Another method is to just drive the car and not worry about doing anything.. the ECU will learn the new parameters and make its own adjustments over a little time and some miles.
#47
Registered Member
The ECU in this car seems to learn and adjust pretty quickly. Let's say you drive really conservative for a few days, then on the last day, you get into it hard. You may notice a slight bit of sluggishness or resistance to accelerate like you are used to. But that will quickly pass as the ECU compensates for these sudden changes in operation. Try it some time.
#48
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Thanks Southernboy. But, I think the confusion is how the presets, seat memory, etc. were still intact after having the battery out and whether or not the ecu was actually reset. I would think it was but this is the first vehicle I've ever pulled the battery out of that kept radio presets, etc.
#49
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Alright I'll say it.. the few times I threw in V-power from shell, I dunno but my car felt sluggish and it had less power IMO. I did get more gas mileage out of it, but sacrificed performance. Once I went back to BP I felt the difference right away in pepiness. The best out of all of em was Chevron, which I use when I'm down here in FL but in NY its strictly BP for me.
I've had a similar dilema and stopped buying gas from a Shell station where I didn't have as much power when I got gas from them. I wouldn't be the least bit surprised if some stations are pumping 89 out of the 93 nozzle from time to time.
#50
Registered Member
Thanks Southernboy. But, I think the confusion is how the presets, seat memory, etc. were still intact after having the battery out and whether or not the ecu was actually reset. I would think it was but this is the first vehicle I've ever pulled the battery out of that kept radio presets, etc.
#51
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My apologies, sir. No doubt the presets are stored in flash memory whereas the codes and the variable (volatile) ECU settings are not. Disconnecting your battery for a bit will reset the ECU which basically means it reverts to default settings. This puts it in a state where it will learn fresh parameters from your engine and all of its sensors and controls.
#53
Registered Member
No, not for flash memory. Think of flash drives or flash cards for cameras. These have no power source when removed from their devices but they hold their data regardless. I bet the presets are stored in the same manner in our cars.
#56
King of NYC
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I don't know what a lot of u are talkin bout. I feel NO difference between brands of gas. True some have additives and detergents like Cheveron but I don't feel anything. As said gasoline comes from the same place for all these brands. Everything is marketing and brand loyalty. The only time I feel a difference is the difference in power between 89 octane and 93 octane, there is a palpable difference there and a mpg difference but that's it....94 octane has no difference to me.
#57
Burning Brakes
#58
just because you dont feel anything on different gas brands doesnt mean the engine isnt noticing~
Do a full induction cleaning of gas tank and manifold cleaner and you may notice a larger differance overall
Do a full induction cleaning of gas tank and manifold cleaner and you may notice a larger differance overall
#59
Drifting
Just to chime in with my thoughts....Top Tier gasoline just means they have enough additives in all grades of gas. Just because another brand isn't Top Tier doesn't mean their premium doesn't have enough additives. It may just mean their 87 octane doesn't have enough. However I'm with the rest of you for the most part...QT, BP, Texaco is about all that goes in my car. When out of town I can find Sunoco and get 93 octane and my MPG seems to go up a tad...or that could be the fact that it is purely highway??
![Tongue](https://acurazine.com/forums/images/smilies/tongue.gif)
#60
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My parents own a gas station and at least in Missouri, E10 is not mandated for Premium. They always put 91 octane in their mini-van just to avoid the E10 since they got slightly less MPG otherwise. And to confirm what someone else said...the same tanker filled the tanks at their station that filled 3 other stations in the area of a different brand. It is the additives that are mixed in that make each brand different.
Just to chime in with my thoughts....Top Tier gasoline just means they have enough additives in all grades of gas. Just because another brand isn't Top Tier doesn't mean their premium doesn't have enough additives. It may just mean their 87 octane doesn't have enough. However I'm with the rest of you for the most part...QT, BP, Texaco is about all that goes in my car. When out of town I can find Sunoco and get 93 octane and my MPG seems to go up a tad...or that could be the fact that it is purely highway??![Tongue](https://acurazine.com/forums/images/smilies/tongue.gif)
Just to chime in with my thoughts....Top Tier gasoline just means they have enough additives in all grades of gas. Just because another brand isn't Top Tier doesn't mean their premium doesn't have enough additives. It may just mean their 87 octane doesn't have enough. However I'm with the rest of you for the most part...QT, BP, Texaco is about all that goes in my car. When out of town I can find Sunoco and get 93 octane and my MPG seems to go up a tad...or that could be the fact that it is purely highway??
![Tongue](https://acurazine.com/forums/images/smilies/tongue.gif)
#62
Burning Brakes
Top Tier is a marketing website and companies pay to be listed. It really doesn't have very much meaning. Gasoline is a generic product that is traded among the gas companies. The only thing that is different is the additive packages which are added when the tanker is filled. There is not even that much difference in the additive packages. Most of it is marketing and advertising. Buy you gasoline from any clean high volume site and you'll be fine. I have worked for one of the major oil companies for many years.
#63
Since we have an expert:
Doesnt Tier 1 mean a specific quality level, above the norm?
And Ethanol at 10% mandated by the us govt- why is Mo not on the standard?
I know what it says on the pumps in Ca, nothing about one octane having ethanol and the next not!
Chevrons website has good info on techroline and states its only a maitenance dose,
to use a concentrated product in the tank to clean, use the good gas to maintain clean
Doesnt Tier 1 mean a specific quality level, above the norm?
And Ethanol at 10% mandated by the us govt- why is Mo not on the standard?
I know what it says on the pumps in Ca, nothing about one octane having ethanol and the next not!
Chevrons website has good info on techroline and states its only a maitenance dose,
to use a concentrated product in the tank to clean, use the good gas to maintain clean
#64
Drifting
http://www.mpca.org/newsletters/2007/103107b.htm
http://www.biofuelsdigest.com/blog2/...n-the-country/
The MO law clearly does make Premium exempt from the E10 rules:
http://www.moga.mo.gov/statutes/c400-499/4140000255.htm
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