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Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > X Series > X3 F25 (2011 - current)

X3 F25 (2011 - current)
The latest X3 brings some added style and some new features to the BMW SUV family. Talk about the new F25 now!

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  #1  
Old 08-17-2014, 09:48 AM
Maxhere Maxhere is offline
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Gas type for X3

Just wondering what fuel type everyone is using: midgrade or premium?


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  #2  
Old 08-17-2014, 10:12 AM
02420X3 02420X3 is offline
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Premium. Always. And Top Tier when I can get it, which is usually.
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  #3  
Old 08-17-2014, 10:26 AM
The X Men The X Men is offline
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89 octane is min requirement but BMW recommend 91.
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  #4  
Old 08-17-2014, 10:27 AM
IndyDog IndyDog is offline
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Which engine type is it? Normally aspirated or turbo? Ours is NA and the manual states:

Super Premium Gasoline/AKI 91 or AKI 89
BMW recommends AKI 91 or 89.
Gasoline with lower AKI
The minimum AKI Rating is 89.
If you use gasoline with this minimum AKI Rat***8208; ing, the engine may produce knocking sounds when starting at high outside temperatures.

I'll use 89 unless it knocks.

Four poppers are turbo charged and will need the higher octane.

Last edited by IndyDog; 08-17-2014 at 10:36 AM.
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  #5  
Old 08-17-2014, 11:54 AM
todd92 todd92 is offline
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How about RTFM instead of, 'what is everyone using'?
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  #6  
Old 08-17-2014, 01:58 PM
missedbass missedbass is offline
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I've used 89 without any problems but usually I will mix it up with 93 now and then. On a trip I will use 93. Don't know if the higher grade will get you better mileage or not. 6cyl. na
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  #7  
Old 08-17-2014, 02:24 PM
IndyDog IndyDog is offline
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I don't get why higher octane would lead to better gas mileage? All a higher octane does is prevent detonation as a result of the heat generated by the compression of the piston. I'd think that not romping on the gas from a start would be a good way to save mpg (but what fun is that?), other driving habits will affect mpg more than octane differences.

Last edited by IndyDog; 08-17-2014 at 02:25 PM.
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  #8  
Old 08-17-2014, 05:06 PM
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Not another 'I bought a $50k BMW but I want to cheap out on fuel' thread topic. Yawn.

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  #9  
Old 08-17-2014, 05:06 PM
farg farg is offline
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We are all driving vehicles that likely average $50K cost across the board Why quibble about 5-8 bucks a tankful for premium fuel?
If economy is the prime driver, then I suspect we should all go out and buy Priuses (Priae?)

IJS
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  #10  
Old 08-17-2014, 05:32 PM
IndyDog IndyDog is offline
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Originally Posted by farg View Post
We are all driving vehicles that likely average $50K cost across the board Why quibble about 5-8 bucks a tankful for premium fuel?
If economy is the prime driver, then I suspect we should all go out and buy Priuses (Priae?)

IJS
Thanks for spending my money. I just sold my boat that drank 50 gallons an hour, if I feel like buying 89 I will.

Last edited by IndyDog; 08-17-2014 at 05:35 PM.
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  #11  
Old 08-17-2014, 06:24 PM
RhoXS RhoXS is offline
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Originally Posted by IndyDog View Post
I don't get why higher octane would lead to better gas mileage? All a higher octane does is prevent detonation as a result of the heat generated by the compression of the piston. I'd think that not romping on the gas from a start would be a good way to save mpg (but what fun is that?), other driving habits will affect mpg more than octane differences.
Because basic thermodynamics demands that to get efficiency and power from an internal combustion engine higher compression ratios are needed. High compression ratios, for a given set of conditions, reduce the margin to detonation. Therefore a higher octane fuel is needed to maintain a safe margin.

If you use a lower than recommended octane, the margin to detonation is reduced and the onset of detonation may indeed occur. The detonation sensor tells the engine management computer detonation is sensed and the computer then retards the spark to increase the margin. A retarded spark is not as efficient so your mpg and power output decrease.

Again, it gets back to the obvious thought; why does one worry about saving a few cents a gallon and violating the manufacturers specifications when they just spent $50K for a car?

And yes, you certainly have the right and ability to but 89 octane gasoline, as you clearly stated in the previous post, but that does not mean most people would afford you a lot of respect for the wisdom behind doing that.

Last edited by RhoXS; 08-18-2014 at 06:20 AM.
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  #12  
Old 08-17-2014, 06:29 PM
luigi524td luigi524td is online now
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My documentation to the person who next buys my '13 535xDrive will include every gas receipt for fills at a Tier1 station with 93 Octane gasoline ... not that really makes a difference to anyone ??

But if I were buying someone's used car and they struggled to spend an extra $300/YEAR (approx cost diff between reg and prem gasoline & driving 15,000/year) for the correct/recommended gasoline I'd wonder what else they cheaped out on.
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Last edited by luigi524td; 08-17-2014 at 06:37 PM.
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  #13  
Old 08-17-2014, 06:51 PM
IndyDog IndyDog is offline
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Originally Posted by RhoXS View Post
Again, it gets back to the obvious thought; why does one worry about saving a few cents a gallon and violating the manufacturers specifications when they just spent $50K for a car?
How am I violating the manufacturers specifications when it says 89-91?
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  #14  
Old 08-18-2014, 06:24 AM
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dandanio dandanio is offline
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Originally Posted by Me530 View Post
Not another 'I bought a $50k BMW but I want to cheap out on fuel' thread topic. Yawn.
This!
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  #15  
Old 08-18-2014, 06:31 AM
The X Men The X Men is offline
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Quote:
Originally Posted by IndyDog View Post
I don't get why higher octane would lead to better gas mileage? All a higher octane does is prevent detonation as a result of the heat generated by the compression of the piston. I'd think that not romping on the gas from a start would be a good way to save mpg (but what fun is that?), other driving habits will affect mpg more than octane differences.
High octane gas produce more HP per each combustion, that means you will get up to cruising speed faster, which in turn let you get off the gas pedal sooner thus saving gas. This only applies if your engine is design to take advantage of the high octane gas.
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  #16  
Old 08-18-2014, 06:10 PM
Doug in NC Doug in NC is offline
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Quote:
Originally Posted by luigi524td View Post
My documentation to the person who next buys my '13 535xDrive will include every gas receipt for fills at a Tier1 station with 93 Octane gasoline ... not that really makes a difference to anyone ??

But if I were buying someone's used car and they struggled to spend an extra $300/YEAR (approx cost diff between reg and prem gasoline & driving 15,000/year) for the correct/recommended gasoline I'd wonder what else they cheaped out on.
Agreed. I always buy Top Tier gas, and only Premium. Don't buy from the cheap gas stations. http://www.toptiergas.com/retailers.html
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  #17  
Old 08-18-2014, 06:34 PM
Maxhere Maxhere is offline
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Buy premium...


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  #18  
Old 08-19-2014, 12:55 PM
mrmeyer mrmeyer is offline
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Originally Posted by Maxhere View Post
Just wondering what fuel type everyone is using: midgrade or premium?
Neither. I'm using diesel.
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  #19  
Old 08-19-2014, 01:06 PM
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neither. I'm using diesel.
b5? D2? B20?
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  #20  
Old 08-19-2014, 03:22 PM
mrmeyer mrmeyer is offline
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Originally Posted by Me530 View Post
b5? D2? B20?
Yes.

All of it is D2 locally, I think. I've only filled up twice so far; the 2nd fillup was B20 and I wasn't sure what effect that would have. But hey, it came out of the fuel nozzle, so I stuck it in my 2015 x28d X3. So far so good.

Actually, I'm a rotating equipment engineer by trade, so you'd think I'd be smart enough not to do that.
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  #21  
Old 08-19-2014, 03:26 PM
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BMW definitely advises that the max biofuel is B5, but I don't think a tank or 2 of B20 is going to cause too much harm....
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  #22  
Old 08-19-2014, 04:09 PM
kevink4 kevink4 is offline
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Originally Posted by Me530 View Post
BMW definitely advises that the max biofuel is B5, but I don't think a tank or 2 of B20 is going to cause too much harm....
The cap says B7.

But it seems like I'v only seen a few types. Pumps with no indication that they use biodiesel. B5. And B20 (where it says somewhere between 5-20%). I skipped that station.

I prefer stations where the diesel is in the same islands as the gas, even if it might only be the end pumps. Some of the other stations I've used have had special areas, and some didn't support paying at the pump.
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  #23  
Old 08-19-2014, 05:16 PM
mrmeyer mrmeyer is offline
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Originally Posted by Me530 View Post
BMW definitely advises that the max biofuel is B5, but I don't think a tank or 2 of B20 is going to cause too much harm....
I backtracked this evening to the same station, closest to where I live, and relieved to discover it's B5 after all.
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  #24  
Old 08-19-2014, 10:07 PM
PFol310 PFol310 is offline
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Originally Posted by Doug in NC View Post
Agreed. I always buy Top Tier gas, and only Premium. Don't buy from the cheap gas stations. http://www.toptiergas.com/retailers.html
Always fill up at Costco and its on the list you provided.

Thanks :thumb up:

Honestly, if you can't afford the extra $2-$3 a fill up difference using premie you probably shouldn't have bought a BMW.

I've always used premie even when I didn't need to. The extra .20 a gallon really doesn't make a difference.
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  #25  
Old 08-21-2014, 11:37 AM
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LycanNyc LycanNyc is offline
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Originally Posted by 02420X3 View Post
Premium. Always. And Top Tier when I can get it, which is usually.


Quote:
Originally Posted by luigi524td View Post
My documentation to the person who next buys my '13 535xDrive will include every gas receipt for fills at a Tier1 station with 93 Octane gasoline ... not that really makes a difference to anyone ??

But if I were buying someone's used car and they struggled to spend an extra $300/YEAR (approx cost diff between reg and prem gasoline & driving 15,000/year) for the correct/recommended gasoline I'd wonder what else they cheaped out on.
Exactly, that's why I'd be worry about buying a car that came out of a 3yr lease a lot of folks don't really care of the lease that well.

Quote:
Originally Posted by The X Men View Post
High octane gas produce more HP per each combustion, that means you will get up to cruising speed faster, which in turn let you get off the gas pedal sooner thus saving gas. This only applies if your engine is design to take advantage of the high octane gas.
Thank You!

Quote:
Originally Posted by Doug in NC View Post
Agreed. I always buy Top Tier gas, and only Premium. Don't buy from the cheap gas stations. http://www.toptiergas.com/retailers.html
Yes

Quote:
Originally Posted by PFol310 View Post
Always fill up at Costco and its on the list you provided.

Thanks :thumb up:

Honestly, if you can't afford the extra $2-$3 a fill up difference using premie you probably shouldn't have bought a BMW.

I've always used premie even when I didn't need to. The extra .20 a gallon really doesn't make a difference.
Not to mention, I've been comparing prices Costco Premium vs BP 93 vs Shell 93 , Costco, BP, Shell in that order of cheapest price to highest but I've also noticed a better responsive/performance with Shell in my Cadillac, BMW e90, 2011 M.Benz C300 i've owned but will test on my X3 now i haven't put shell yet maybe my previous cars were into shell since I used it for longer than any other brand lol.
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