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Old 07-24-2017, 04:15 PM
gozulin gozulin is offline
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0-60mph times for regular gas vs premium gas?

Hi all,

I've noticed my 2017 330i has less acceleration than my 2014 328i did.

I've always used regular gas. I know BMW recommends 91 octane.

How many milliseconds from my 0-60 will I shave if I switch from 87 to 91 octane?

I've been googling and I find a lot of opinions but no actual hard benchmarks for acceleration.

Does anybody have any hard numbers specifically on acceleration ?

Thanks
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  #2  
Old 07-24-2017, 05:41 PM
John MS John MS is offline
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Why don't you try five runs on a fresh full tank of each fuel and let us know the differences. Great opportunity!
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Old 07-24-2017, 06:11 PM
Michael Schott Michael Schott is online now
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Do you know for sure that your 2017 is slower than your 2014? As far as the octane, none of us are good enough drivers to run accurate tests.
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Old 07-24-2017, 06:43 PM
ClevelandBeemer ClevelandBeemer is offline
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Take it to a drag strip and make a few passes. Be sure to power brake. Then compare your runs to C&D's review test sheet.
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Old 07-24-2017, 08:40 PM
gozulin gozulin is offline
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Quote:
Originally Posted by John MS View Post
Why don't you try five runs on a fresh full tank of each fuel and let us know the differences. Great opportunity!
I totally would but i would need a copilot to time me. Everybody I know is afraid of my driving. I don't know why...The only time I was at fault in an accident, it was under 5 MPH (raining, bald tires, bad brakes, stop and go traffic on the highway, looking at the radio to get music on, crash. Other car had 0 damage and no claim was filed. I AM A SAFE DRIVER! I AM, DAMMIT!) Are you going to be in south florida anytime soon? You strike me as a courageous man. Let's do this.

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Originally Posted by Michael Schott View Post
Do you know for sure that your 2017 is slower than your 2014? As far as the octane, none of us are good enough drivers to run accurate tests.
It feels that way. I was expecting the opposite given the extra couple HP on the new one, but nope! So I went online to see what the numbers are, and sure enough, the 2017 is a 0.1 or 0.2 seconds slower than the 2014. Why? Not sure. Weight? Both cars have runflat tires so that can't be it...


Quote:
Originally Posted by ClevelandBeemer View Post
Take it to a drag strip and make a few passes. Be sure to power brake. Then compare your runs to C&D's review test sheet.
What does power brake mean? accelerating while braking and then release to brakes to start faster? Sounds cool but I'm interested in real life driving. So, start engine, start clock, hit gas, stop clock when needle reaches 60

Anyways, looks like nobody in the world thought to do this. I feel special and disappointed at the same time
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Old 07-24-2017, 08:50 PM
SergeyM SergeyM is offline
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Quote:
Originally Posted by gozulin View Post
I totally would but i would need a copilot to time me. Everybody I know is afraid of my driving. I don't know why...The only time I was at fault in an accident, it was under 5 MPH (raining, bald tires, bad brakes, stop and go traffic on the highway, looking at the radio to get music on, crash. Other car had 0 damage and no claim was filed. I AM A SAFE DRIVER! I AM, DAMMIT!) Are you going to be in south florida anytime soon? You strike me as a courageous man. Let's do this.



It feels that way. I was expecting the opposite given the extra couple HP on the new one, but nope! So I went online to see what the numbers are, and sure enough, the 2017 is a 0.1 or 0.2 seconds slower than the 2014. Why? Not sure. Weight? Both cars have runflat tires so that can't be it...




What does power brake mean? accelerating while braking and then release to brakes to start faster? Sounds cool but I'm interested in real life driving. So, start engine, start clock, hit gas, stop clock when needle reaches 60

Anyways, looks like nobody in the world thought to do this. I feel special and disappointed at the same time
The new 2.0 liter is more powerful on paper but is less powerful in reality.
If you trust Dinan the old N20 engine had 268hp and 287lb/f torque. The new B46 has only 256hp and 263lb/f torque.
Most magazines also got slower 0-60 mph times for 330 than for the old 328.
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Old 07-25-2017, 04:50 AM
ClevelandBeemer ClevelandBeemer is offline
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Quote:
Originally Posted by gozulin View Post
What does power brake mean? accelerating while braking and then release to brakes to start faster? Sounds cool but I'm interested in real life driving. So, start engine, start clock, hit gas, stop clock when needle reaches 60



Anyways, looks like nobody in the world thought to do this. I feel special and disappointed at the same time

It's been thought of you just have to look. http://www.caranddriver.com/reviews/...-tested-review

Also why would you purchase a $40k+ and not use the required fuel? I believe your manual says your car requires 91 octane or higher.




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Old 07-25-2017, 06:30 AM
jjrandorin jjrandorin is offline
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Quote:
Originally Posted by ClevelandBeemer View Post
It's been thought of you just have to look. http://www.caranddriver.com/reviews/...-tested-review

Also why would you purchase a $40k+ and not use the required fuel? I believe your manual says your car requires 91 octane or higher.




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I think it actually says 89 required, 91 recommended (US octane measurments). I have no idea why someone would by a car this expensive but refuse to put premium fuel in it. With that being said, I have read a decent amount about fuel types, and anti knock sensors in modern engines if you dont use the recommended fuel, etc.

From what I remember (for example ) there is no real measurable difference in using 89 vs 91 octane for gas mileage, if 89 is the recommended fuel. Most of the stations I go to no longer sell 89 octane (and I would use 91 anyway... because I feel it will burn better, and I have less concern about anti knock sensors etc).
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Old 07-25-2017, 08:07 AM
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Originally Posted by jjrandorin View Post
Most of the stations I go to no longer sell 89 octane
Must be a California thing. Most filling stations in the Mid South dispense 89 AKI fuel, which is what I use in my F30 for street driving. I use 91 AKI fill ups only if I'm participating in HPDE or other track sessions.

gozulin, I have not done a comparison of acceleration times when my car's fuel tank is filled with 89 AKI gasoline versus 91 AKI, sorry.
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Old 07-25-2017, 09:22 AM
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You need something like a VBOX to do this with any real accuracy. You would also need to do a number of runs on each fuel & get an average. Tank & fuel system would need to be purged between fuel tests. Also the test needs to be back to back, same location, same temperatures (car & ambient) etc.

That's why no one will bother to do it.
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Old 07-25-2017, 12:33 PM
jjrandorin jjrandorin is offline
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Originally Posted by gkr778 View Post
Must be a California thing. Most filling stations in the Mid South dispense 89 AKI fuel, which is what I use in my F30 for street driving. I use 91 AKI fill ups only if I'm participating in HPDE or other track sessions.

gozulin, I have not done a comparison of acceleration times when my car's fuel tank is filled with 89 AKI gasoline versus 91 AKI, sorry.
Its probably not a california thing, but a "me" thing because I fill up at costco most of the time. They dont have mid grade unleaded, and the premium unleaded there is cheaper than mid grade at just about anyplace else I would buy gas.

Just as an example, 91 is 2.85 at my local costco, and the shell station within 1/4 mile of that costco has mid grade (89) at 2.99 for credit or 3.19 for cash. At that same shell, 91 is 3.09 credit or 3.29 cash. So 91 is more than 30 cents a gallon more than costco (which is top tier gas) or, conversely, I get 91 for cheaper than 89.
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Old 07-25-2017, 01:09 PM
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Originally Posted by jjrandorin View Post
Just as an example, 91 is 2.85 at my local costco, and the shell station within 1/4 mile of that costco has mid grade (89) at 2.99 for credit or 3.19 for cash. At that same shell, 91 is 3.09 credit or 3.29 cash. So 91 is more than 30 cents a gallon more than costco (which is top tier gas) or, conversely, I get 91 for cheaper than 89.
Wow, gasoline is quite expensive in your part of California, at least in the context of fuel prices I'm accustomed to in Mississippi and Tennessee.

At the Shell station at Goodman Rd. and Airways Blvd. in Southaven, Mississippi, 87 AKI gasoline is about $1.85 per gallon, 89 AKI is about $2.10, and 91 is $2.40.

Good point about Costco or Sam's Club - the Sam's Club filling station in Southaven also dispenses only 87 or 91 AKI fuel (no mid-grade 89 AKI offering). Sam's Club pricing on gasoline is typically the lowest in Southaven, averaging 5 cents per gallon lower on 87 AKI and 10 cents or more lower on 91 AKI. 89 AKI fuel at the Shell station is still less expensive than 91 AKI at Sam's Club.

BMW really needs to calibrate its gasoline engines for U.S. market cars to operate well on 87 AKI fuel, like just about all other automakers!
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Old 07-25-2017, 01:42 PM
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FWIW Got gas today at Shell. 93 was 2.85 & 87 was $2.10. Costco is always cheaper, fill when I am there but don't make a special trip for gas.

3 stations within 3 miles BP, Shell & Exxon. There is also a Marathon station 2 blocks away but don't go there much with the high CR cars.
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Old 07-25-2017, 03:24 PM
VCuomo VCuomo is offline
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Wow, gasoline is quite expensive in your part of California, at least in the context of fuel prices I'm accustomed to in Mississippi and Tennessee. ...
It's quite expensive in all of California, and it'll get more expensive on 1/1/18 if the gas tax hikes that our a-hole politicians in Sacramento passed actually go into effect.

I was in Pennsylvania recently - their gas prices were a pleasant surprise!
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Old 07-25-2017, 07:59 PM
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Originally Posted by gkr778 View Post

BMW really needs to calibrate its gasoline engines for U.S. market cars to operate well on 87 AKI fuel, like just about all other automakers!
Maybe they do the same as others?

Using premium will allow higher horsepower, which people look at. Premium also often results in better gas mileage, which some organizations don't want to admit. Note that the improved gas mileage is about 1 mpg, according to the EPA when testing a Saab in 2005. 1 mpg does not cover the increased cost of premium.

I tested using regular in another car and there was no difference or too little to notice in acceleration. After about the first tank, there was no difference in smoothness.

In another car, there was probably improved gas mileage around half to one mpg but difficult to determine if it was statistically significant because of noise (overlap in mpg of midgrade versus premium).

My feeling is if the F30 recommends 89, use whatever you want as long as it's at least 89 and you don't keep changing. I am uncertain if 93 is any better than 91. Here, there's 92 so it's not worth it to mix with a little 87 to make 91.

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Old 07-26-2017, 10:16 PM
After Hours After Hours is offline
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Let's do the math. At your Shell station, it costs 10 cents more a gallon to get the 91 octane rather than the 89 octane. If you get only 25 mpg, in 25,000 miles you would spend an extra $100. If if you drive 15,000 miles a year, buying the recommended gas would cost you $60 more a year, or $5 more a month. I have my own quirks, like squeezing every last drop of tooth paste out of a tube, and then I waste multiples of the cost of toothpaste in other ways. The English used to call it being penny wise and pound foolish. Hey, loosen up! Buy the better gas, tell yourself that the car not only goes faster but it will last longer, and enjoy yourself.
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Old 07-26-2017, 11:31 PM
Eluded Eluded is offline
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Octane aside I think current car and some driver said the 330 was slower than the last 328 they tested.
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Old 07-27-2017, 05:29 AM
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Originally Posted by After Hours View Post
Let's do the math. At your Shell station, it costs 10 cents more a gallon to get the 91 octane rather than the 89 octane. If you get only 25 mpg, in 25,000 miles you would spend an extra $100. If if you drive 15,000 miles a year, buying the recommended gas would cost you $60 more a year, or $5 more a month. I have my own quirks, like squeezing every last drop of tooth paste out of a tube, and then I waste multiples of the cost of toothpaste in other ways. The English used to call it being penny wise and pound foolish. Hey, loosen up! Buy the better gas, tell yourself that the car not only goes faster but it will last longer, and enjoy yourself.
I was the one who quoted the gas prices (not OP) and I mentioned I use 91 exclusively so not sure who this is directed at. OP did not mention what the difference in his local gas prices are I dont think... just that they use "regular" gas, which "I" would define as 87 not 89.

So OP is using 87 unless he says something different... but did not mention the difference in pricing between regular (which is not recommended for the engine) and 91 or 89 which is.

OP isnt hearing knocks or anything in the engine because of the anti knock sensors etc in the engine, but still should not be using 87 because its not recommended for the engine. Now... mid grade or "super" ( 89 or 91) thats the argument you are making, and I agree with... which is why I buy 91.
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Old 07-27-2017, 09:49 AM
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Problem with not hearing the knock is a lot of times you can't hear it but the computer can & is cutting timing before it becomes audible. The other thing is in very normal driving you are not stressing the engine at all.

Pull out to pass, accelerate going up hill, going up long hills with a load etc is when you will encounter most audible knocks if, big if, the ECU does not reduce timing first.

Think the bottom line on saving money is at most driving patterns its a few hundred dollars spread over 365/366 days. Less than a $1.00 a day. No logical or economic reason not to go with 91/93. Having sufficient octane is like carrying a weapon, you don't need it till you need it.
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