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      04-28-2014, 07:07 PM   #1
abmwdummy
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Question Premium gas necessary?

We just got a 2014 X5. Is it really necessary to use premium gas? Would 89 do? What harm would 87 cause? Thanks!
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      04-28-2014, 07:15 PM   #2
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The computer will adjust the timing and operating parameters to adjust the engine operation to the conditions and the quality of the fuel. But, there are limits. When the octane is below the range it can handle, it could cause engine damage. You are only guaranteed the design performance if it has the desired octane. When the computer detunes the engine, you will get less MPG and performance, so in the end, it may end up costing about the same or even more to use the lower octane since you'll use more of it. Driving very conservatively, you may not notice the performance differences, but most people do notice.
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      04-28-2014, 07:17 PM   #3
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I use 91 the recommended grade. You may not have seen this recent thread, from 87 to 91, varied thoughts that you may ponder. Posted are some very good analysis.
http://f15.bimmerpost.com/forums/sho...ght=gas&page=2
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      04-29-2014, 06:43 AM   #4
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I've parked the F30 in the garage for now (due to sharp increase in Gasoline prices here in Canada)... In contrary, Diesel price which was almost as high as Premium during winter has dropped significantly...right now, it is even lower than 87!!!
I'm currently enjoying the "Diesel experience!"...
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      04-29-2014, 06:46 AM   #5
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Quote:
Originally Posted by barcelona View Post
I use 91 the recommended grade. You may not have seen this recent thread, from 87 to 91, varied thoughts that you may ponder. Posted are some very good analysis.
http://f15.bimmerpost.com/forums/sho...ght=gas&page=2
+1...I wouldn't use anything lower than what is indicated as "minimum"...
On my previous X3 it was 91 as minimum...
On my F30 it is 89 as minimum...
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      04-29-2014, 10:22 AM   #6
jeffhoff
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Quote:
Originally Posted by abmwdummy View Post
We just got a 2014 X5. Is it really necessary to use premium gas? Would 89 do? What harm would 87 cause? Thanks!
In general premium fuel runs about $0.10/gallon more than the mid grade. Assuming approximately 15 gallons/fill up you're talking a difference of $1.50 every time you fill up.

Given your driving a $60k+ vehicle it shouldn't be an issue spending an extra $1.50
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      04-29-2014, 10:55 AM   #7
Zipforia
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Quote:
Originally Posted by jeffhoff View Post
In general premium fuel runs about $0.10/gallon more than the mid grade. Assuming approximately 15 gallons/fill up you're talking a difference of $1.50 every time you fill up.

Given your driving a $60k+ vehicle it shouldn't be an issue spending an extra $1.50
+1

Z.
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      04-29-2014, 11:56 AM   #8
GoSooners
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Quote:
Originally Posted by jeffhoff View Post
In general premium fuel runs about $0.10/gallon more than the mid grade. Assuming approximately 15 gallons/fill up you're talking a difference of $1.50 every time you fill up.

Given your driving a $60k+ vehicle it shouldn't be an issue spending an extra $1.50
+2

Or should have gotten a diesel if you were looking for savings. Diesel is $0.20 less than Premium right now in my area.
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      04-29-2014, 01:55 PM   #9
Jenya B
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Quote:
Originally Posted by Shaw View Post
I've parked the F30 in the garage for now (due to sharp increase in Gasoline prices here in Canada)... In contrary, Diesel price which was almost as high as Premium during winter has dropped significantly...right now, it is even lower than 87!!!
I'm currently enjoying the "Diesel experience!"...
i'm using Mac's gas station on MajMackenzie and Jane , they always 10cents lower than others . Diesel last week was 1.29$
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      04-29-2014, 06:39 PM   #10
abmwdummy
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Thank you everyone for the quick reply!
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      04-30-2014, 08:07 AM   #11
Shaw
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Quote:
Originally Posted by Jenya B View Post
i'm using Mac's gas station on MajMackenzie and Jane , they always 10cents lower than others . Diesel last week was 1.29$
funny you should mention that...I did fuel up there couple of weeks ago...very interesting prices!!!
Sadly, I'm not near that station to make it a regular visit...
the ones close to us are offering $1.33...
I will always keep in mind when passing major mack!
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      05-03-2014, 06:51 AM   #12
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20130508080132890.pdf

Definitely not 87, unsure why someone would.

Source: Roundel 4/13, Mike Miller. Sounds good except his philosophical comments at the end.
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