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BMW X3

3287 messages,  Last post on Nov 14, 2009 at 6:14 PM

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What is this discussion about? BMW X3, SUV


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#3124 of 3287
Re: Gasoline [alaskan_otter] - does midgrade prevent catalytic burnup? [natalie02le] by roadburner
Jun 11, 2008 (8:59 pm)
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Replying to: natalie02le (Jun 11, 2008 10:21 am)

Using 89 octane fuel instead of 91 octane will save you something like 15-20 cents per day. Use what BMW's engineers call for-91 octane-and don't worry about it.
#3125 of 3287
Re: Gasoline [alaskan_otter] - does midgrade prevent catalytic burnup? [natalie02le] by natalie02le
Jun 14, 2008 (8:31 pm)
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Replying to: natalie02le (Jun 11, 2008 10:21 am)

so nobody has heard if 87 octane burns up the catalytic converter?
#3126 of 3287
1st Oil Change by nyccarguy
Jun 24, 2008 (6:57 pm)
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So with 15,207 miles on the odometer my wife took her Montego Blue '07 X3 3.0si in for its first service. This was only the second time the truck has been back to the dealership since we took delivery on 7/31/07. Besides an oil & filter change, they replaced all 3 wiper blades and topped off her coolant (which was low, causing the idiot light on the dash to illuminate).
 
I know the "free" service is built into the price of the car, but it is a really nice thing. Coupled with the long service intervals (if I owned it I would change the oil every 7500, flush the coolant & brake fluid every 2 years, the tranny fluid every 3 years... Just like they used to before "free" maintenance) makes these cars great to lease.
 
Now besides the free service, the best part about taking the X3 in to the dealer was the loaner car provided . My wife was instructed to call me immediately and let me know what the loaner car was. Low and behold it was an '08 335xiA. After dinner I promptly volunteered to install our 21 month old son's car seat (which was to be followed by a short test drive). This car is scary fast. I came away from my extended test drive (from our place in Westchester, NY up to my best friend's place in Norwalk, CT) blown away by the N52's performance. You can pass any car at any time with a quick stab of the gas pedal (half way). On one ramp that goes from an eastbound highway (I-287) to a northbound highway (I-95), I floored the gas pedal while merging and blew past 2 tractor trailers. I looked down and noticed I was going over 100 mph. Like I said, scary. But what a ride!
 
There's a saying among car guys: "You can never have too much power." The N52 doesn't have too much power, but it has enough.
 
I don't drive like a lunatic. I take twisty roads at a nice clip when they're empty. I usually double the speed of exit ramps. If I'm running late for something and have to get there, I make up for the lost time. Most days I loaf my way home at around 60 mph with the cruise control set (especially now since gas is $4.57 a gallon). a twin turbo 135i or 335i would turn me into a complete hooligan. I'd probably have to see if I could pre-purchase speeding tickets in bulk from Westchester County, New York State, and The City of New York. Just give me a stick and a sport suspension on a 128i or 328i and I'd do just fine.
#3127 of 3287
Re: 1st Oil Change [nyccarguy] by roadburner
Jun 25, 2008 (8:30 am)
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Replying to: nyccarguy (Jun 24, 2008 6:57 pm)

My dealer(Swope BMW, Louisville) also provides nice loaners, but-since it's my wife's car- my service advisor gears them to what she likes- hence we've received an X3 3.0 Sport(my son liked the ///M steering wheel and sill guards), an X5 3.0si, and a 528xi. I think I could live with a 328i coupe with a stick and SP, but the same money can get you a very nice E46 M3- maybe even with the Competition Package. My service advisor is also tempting me with his pristine Dakar E36 M3 coupe. If I bought that I'd have more than enough money left over to upgrade the speakers, buy a set of track tires and wheels, and fit the TMS/Conforti Stage II Performance Package.
#3128 of 3287
Re: Gasoline [alaskan_otter] - does midgrade prevent catalytic burnup? [natalie02le] [roadburner] by markcincinnati
Jul 09, 2008 (6:03 pm)
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Replying to: roadburner (Jun 11, 2008 8:59 pm)

The folks who claim to know, would disagree -- you will NOT save any money, per day. You will cost yourself per day, due to the fact that you will use more fuel to achieve the same performance.
 
The BMW engine in the X3 is "optimized" for premium.
 
It will run sub-optimized (and cost more) if you use regular or mid grade. What we are talking about is a false economy.
 
Using gas that is higher in octane than your engine requires is a waste of money. Using gas that is lower in octane than your engine requires makes it cost more to drive than if you used what it has been optimized to run on.
#3129 of 3287
Re: Gasoline [alaskan_otter] - does midgrade prevent catalytic burnup? [natalie02le] [roadburner] [markcincinnati] by natalie02le
Jul 10, 2008 (1:43 pm)
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Replying to: markcincinnati (Jul 09, 2008 6:03 pm)

"...my question is this and only this: Would fulltime use of sub-89 octane do any damage to the catalytic converter? Yes or no."
 
still no info. out there anywhere about catalytic converter damage?
 
random comment: my 20+ year old Audi had 4 knock sensors and it optimized itself to run on whatever octane level i chose to put in the tank.
#3130 of 3287
Re: Gasoline [alaskan_otter] - does midgrade prevent catalytic burnup? [natalie02le] [roadburner] [markcincinnati] [natalie02le] by markcincinnati
Jul 10, 2008 (6:45 pm)
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Replying to: natalie02le (Jul 10, 2008 1:43 pm)

The 20 year old Audi was set to PROTECT itself from lower octane fuel. It retarded the spark to reduce pre ignition detonation. This simple method, although fundamentally preventing "knock" required more gas when it was low octane to achieve the same performance.
 
Today, the same thing happens, more or less -- the ignition is retarded to prevent compression ignition.
 
One could imagine that, therefore, there could be a chance that more incompletely burned gas would be forced out the exhaust valve, and out to the exhaust pipe, down to the cat conv. If less completely burned fuel is input to the cat converter, one could argue some premature "damage."
 
Someone who actually does know the nuances of this will, hopefully reply. At the current price of gas -- mid grade usually costing 10 cents less per gallon than premium -- and knowing the reduced efficiency of mid grade, why would someone actually want to spend more money for less performance.
 
Unless, of course, the real reason BMW requires premium is to maintain the illusion of superiority. I do not know if BMW would require premium to suggest its engines are really more "upscale" than their actual technology would prove, but I seriously doubt it.
 
Your 20 year old Audi did optimize itself, sort of, to preven knock -- but you paid a premium in money for not using premium gasoline.
 
Waste not, want not.
#3131 of 3287
X3 2004 Creaking Noise & Mix Tires problems by mohannad
Aug 12, 2008 (3:20 am)
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Dears,
 
i have two main problems in my X3 2004 car where the dealer in KSA is unable to troubleshoot or pinpoint how, where and all those questions!
 
the first problem is the creaking noise which comes from all the doors (or windows) when ever i drive over a non smooth road (which in KSA-Jeddah happens to be most of the roads). the dealer is saying this is an X3 problem and there is no solution, but its so annoying and no one can understand this is a BMW. whenever i lower the noise mostly disappears. so anyone passed through this problem and is there any solution?
 
the second problem which caused the dealer to get me a new gear box thinking the problem resides there but it wasn't from the gearbox. the problem is, whenever I'm accelerating (RPM goes above 4) some hard shifting will occur repeatedly (shifting is not the right word i guess, it feels like if 2 cylinders are moving together and there is a teeth in one of the cylinders broken, so there will be a shift whenever the first cylinder reaches that broken teeth). The only thing i was able to pinpoint is that my tires are mix (18in 255 rear & 18in 235 front) whenever i replace the tires with one size all (18in 235 rear & front) the problem will go away; some technicians said it might be the transfer box. if I'm driving in traffic and slow pace, alot of bubbing sound will come from the rear. again anyone passed through any similar problem.
 
last problem, my windows used to go down and up by pressing the key once, after i took it for maintenance check, i lost this feature, and the dealer guys are saying i don't have that feature ....so any clue how can i get this feature back.
 
thanks for your help
#3132 of 3287
Re: X3 2004 Creaking Noise & Mix Tires problems [mohannad] by roadburner
Aug 12, 2008 (10:42 am)
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Replying to: mohannad (Aug 12, 2008 3:20 am)

the first problem is the creaking noise which comes from all the doors (or windows) when ever i drive over a non smooth road
 
BMW of North America has released a couple of service bulletins on the topic. If your local dealer cannot obtain the bulletin you might try lubricating the door seals and window channels with a rubber compatible product such as Vinylex.
 
the second problem which caused the dealer to get me a new gear box thinking the problem resides there but it wasn't from the gearbox.
 
The problem is that BMW's all wheel drive system is designed to work with four identical tires. Mixing tires of different diameters can cause the problem you describe. Run the same size tire on all four wheels.
 
last problem, my windows used to go down and up by pressing the key once, after i took it for maintenance check, i lost this feature, and the dealer guys are saying i don't have that feature ....so any clue how can i get this feature back.
 
The one touch feature can be enabled or disabled by the dealer. It sounds like your dealer does not know very much-if anything-about the X3. Is there another dealer in KSA that you could bring the car to?
#3133 of 3287
Catalytic converter & Octane questions by jrynn
Aug 13, 2008 (11:23 am)
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LEADED gas will wreck your catalytic converter, not typical grades of unleaded gas.
 
BMW (and other premium manufacturers) use premium fuel so that when they test (and report) engine performance, they can max out horsepower and torque numbers. That they recommend 91 octane is rather silly, as the typical grades sold at US gas stations are 87/89/93.

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