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General E46 Forum
This is the place to get answers, opinions and everything you need related to your E46 (sedan, coupe, convertible and wagon) BMW!

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Old 05-07-2011, 02:09 AM   #61
carcus
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Old 05-07-2011, 07:30 AM   #62
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I feel your pain on the Wrangler...
Yeah, I miss it, especially with this weather we have right now. But $70.00 a week in gas - it was hard to justify keeping it.
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Old 05-08-2011, 02:00 AM   #63
2003 325i
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Put in half a tank of 87 (in case of issues and i needed to balance it out with 91). Car runs fine. I will likely only use 87 octane from here on out. Regret not doing this earlier.
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Old 05-08-2011, 02:14 AM   #64
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My last tank (almost empty) has been 89. My next one is going to be 87. Know a guy who works as a tech at a BMW dealer and drives an E9X and puts in 87. It won't hurt, especially not your wallet.

BTW I maybe lost 0.2-0.3 L/100 Km (which is just over 1 Mi/USG) in going to 89 octane, however a lot of the driving was in windy conditions which adversely affects mileage as well. Just be glad you're not buying gas in Canada, you guys in the states with your American Peso have it good
Saving $0.10 per gallon is worth going with 87??

Dude, you're only saving about $1.40 every fillup just to put crappier gas in your car........ WOOT
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Old 05-08-2011, 02:58 AM   #65
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Saving $0.10 per gallon is worth going with 87??

Dude, you're only saving about $1.40 every fillup just to put crappier gas in your car........ WOOT
Yep....there is not really much of a difference in the long run. Makes people feel better that they saved some money though I guess. Hey....that is a free cheeseburger every fill up....LOL..."Man....I will suck your....for a cheese burger!"...ROFLOL!!!!
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Old 05-08-2011, 05:00 AM   #66
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Heavier the foot, less mpg.
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Old 05-08-2011, 12:49 PM   #67
new//M3fan
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Pouring in 91 octane gets you more gas mileage out of the m54 since the DME adapts and changes ignition timing (advances); The result is you need less gas to get more power/response out of the engine netting you more MPG. Where as if you use 87 octane the DME retards ignition timing and you have to feed the car more gas to get the same pull. I only use 91 or 93 octane and I'm sitting at 26.4 mpg combined. Climbs up to 32 on the highway.
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Old 05-08-2011, 02:25 PM   #68
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You can drive like less of a douche.

Or stop whining like a little b!tch.
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Old 05-08-2011, 03:01 PM   #69
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You can drive like less of a douche.

Or stop whining like a little b!tch.
Do you kiss your mother with that mouth lol
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Old 05-08-2011, 03:37 PM   #70
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First, what gas do you put in it? Always put 93 octane in it. Go to Walmart and buy about five bottles of Lucas fuel treatment. Fill your car up with 93 and pour in the Lucas. Run the car till you need to FILL UP again. Then again add the Lucas. Keep doing this and use all the Lucas up. This should help you, I was having the same problem and did this and now I get awesome gas milage. BTW I work in the city and drive in downtown traffic all the time and it still does great. I put Lucas in now every time I fill up, just cheap insurance. Let me know if this helps.
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Old 05-08-2011, 05:40 PM   #71
2003 325i
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Saving $0.10 per gallon is worth going with 87??

Dude, you're only saving about $1.40 every fillup just to put crappier gas in your car........ WOOT
Umm, no... don't go hucking rocks when you don't even know the situation... here's some math...

Where I live (you can see if you open your douchy eyes and look to the left of what you're currently trying to read with your grade 4 edumacation) 91 is currently about $0.16/L more than 87 octane. At about 60L per fillup that is $9.60 per fill-up. Since I run nearly a tank a week that's in the neighbourhood of $500/year. I consider this amount significant, compounded with the fact that I've noticed no real decrease in fuel economy makes me think it's a wise choice.

P.S. that's even more money if you convert it to your American Peso

P.P.S. It's not crappier gas, it's different octane gas. Maybe you should read up on what octane rating actually is... if you can... read, that is.

Last edited by 2003 325i; 05-08-2011 at 05:43 PM.
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Old 05-08-2011, 06:06 PM   #72
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if you want to know the difference of fuel on your ride test it. Assuming you drive similar patterns - fill it up with 87 and record your mileage. when it is close to empty, fill it with 93. take your mileage from this fill up and subtract your last mileage to get the number of miles you drove. Then look at your receipt to determine how many gallons it took to fill it back to "full" - divide them out and see what your average is. (might be a good time to check your dash MPG indicator for accuracy) - do the same thing after the 93 and see if it helps. on the next go-round, try some seafoam.. I might do a study like this sometime, sounds interesting. Some warn that additives could break old junk in your tank free and clog your injector screens, etc..
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Old 05-08-2011, 06:46 PM   #73
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Originally Posted by 2003 325i View Post
Umm, no... don't go hucking rocks when you don't even know the situation... here's some math...

Where I live (you can see if you open your douchy eyes and look to the left of what you're currently trying to read with your grade 4 edumacation) 91 is currently about $0.16/L more than 87 octane. At about 60L per fillup that is $9.60 per fill-up. Since I run nearly a tank a week that's in the neighbourhood of $500/year. I consider this amount significant, compounded with the fact that I've noticed no real decrease in fuel economy makes me think it's a wise choice.

P.S. that's even more money if you convert it to your American Peso

P.P.S. It's not crappier gas, it's different octane gas. Maybe you should read up on what octane rating actually is... if you can... read, that is.
If your story holds truth why are you so touchy about it "It's not crappier, just different ...."

Did your boyfriend mark his status as "single" this morning? lol
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Old 05-08-2011, 07:46 PM   #74
2003 325i
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If your story holds truth why are you so touchy about it "It's not crappier, just different ...."

Did your boyfriend mark his status as "single" this morning? lol
An excellent rebuttal to my post. Make some homosexual-hate remaks and dispute nothing about what I wrote. I bow to your inferior intelligence.
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Old 05-08-2011, 09:45 PM   #75
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An excellent rebuttal to my post. Make some homosexual-hate remaks and dispute nothing about what I wrote. I bow to your inferior intelligence.
"Liiiiiiight-saberrrrr... + 10 XP" okay you win guy



Keep putting shitty azz 87 in your bimmer. Let's just all eat cheeseburgers and fries for meals too because my performance seems to be the same whether I eat that or real meals...
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Old 05-08-2011, 10:01 PM   #76
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come on guys.. this type of rhetoric has no place on the board.
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Old 05-08-2011, 10:26 PM   #77
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I average 21.3mpg with mostly city driving. Plus 19s with low-pro tires. I used to be at 16-17 but changed my driving habits
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Old 05-08-2011, 10:37 PM   #78
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Brilliant!!!!

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Originally Posted by reez777 View Post
I'm not sure if this will work for all E46 owners, but I increased my MPG from 20 to 25.5 by doing two things

i) taking the spare wheel out of the car.
ii) taking my girlfriend out of the car.

Weight Loss of the two items combined was enough to get my MPG shooting up.
Great advice!! I'm doing it! Well my M didn't come with a spare... So all I gotta do is kick the GF out
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Old 05-09-2011, 04:09 AM   #79
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I can attest to the K&N filter for better mpg, if your stock one is getting old definitely upgrade!
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Old 07-15-2012, 04:25 AM   #80
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It's really all about watching out for red lights and releasing the gas ahead of time.
Also:
Cruise Control on the highway if there is not much traffic(keep the speed steady)
Try to stay in one lane so you don't have to accelerate when changing lanes.
I always get 91/supreme gas for my e46.
Windows down when not in the fwy(not going fast) and windows up and mostly no AC as well when on the fwy.
Leaving enough gap between you and the car in front of you also helps with less braking.
Always glance at the MPG meter when stepping on the gas/brake.

^with these I've increased my mpg for the past few months from 16/17 to 23mpg. My goal is to get it up to 25-30.

Although when it is payday / my tank is full, I go a bit faster to enjoy the car.
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