regular gasoline
$6 a tank savings? You guys are paying a helluva lot for the difference in octane. I pay 10 cents a gallon more, so on a tank it's about a $1.89. No way I'm taking a chance over some pocket change, even if it were $6 a gallon. $300 a year won't buy crap on a possible repair. But whatever you decide to do, good luck and let the forum know how it goes.
No need to explain as you've already done enough with numbers thus far. But see with this specific post you're leaving out some variables. For instance someone may look at that salary and their eyes would open...others may be on the same level... all depends where you live. I had my current employer offer me the same position in California. I told them even if they increased my current salary by 112% it would not even be considered as 112% is the bottom line for consideration only!Anyway, like I originally said, I've been driving these machines for 10 yrs now and I never had a problem with 89, of course, off and on that is....I swear I've seen more MPG on regular and at times it responded better... perhaps that other poster was right. We're getting duped on the 'tag' of the gasoline. Probably the same stuff 89 or 93
but i said it from the start i don't care to hear what bmw recommends, nor do people need to keep insisting that they don't understand how a bmw owner would be cheap. i'm cheap because i don't like my bmw and don't plan to own it much longer. period. if that isn't good enough reason, go back to #1 and #2 and then stop your bitching. it's not any of your business why i choose to run my car with KY jelly if i so choose to do so. and i'm really, really sorry if it makes other bmw owners feel cheap or unworthy. my bad. 
/rant (for now)

/rant (for now)
1. if i'm getting 5mpg more with lower octane, i think it's safe to say i'm saving a hell of lot more than $200 per year
2. if i'm getting 5mpg more with lower octane, sounds to me like my engine runs better on lower octane anyway
3. supposing #2 isn't true, i will most likely trade my car in within a year for something i like that won't have the mechanical issues this thing seems to have while ON 93 octane. if there are going to be long-term effects of the 87 octane gas in my car, that's fine by me, i don't plan on owning it when that happens. judging by my car's rocky past, i doubt it's going to have any trouble at all with having a bazillion problems completely impertinent to octane levels anyway.
4. i didn't pay anywhere close to 40k for my car, i paid in the 20s. even so, it tickles me how some BMW owners (you) get your panties in a wad by other BMW owners (me) that don't care to follow BMW's "recommendations."
quite frankly, i could have responded and said that my daughter was in a freak accident and my health insurance isn't covering it so i'm trying to save every penny i can, and i would have just made you look like a complete dick for your post. alas, that isn't the truth and i'm not going to lie, but i said it from the start i don't care to hear what bmw recommends, nor do people need to keep insisting that they don't understand how a bmw owner would be cheap. i'm cheap because i don't like my bmw and don't plan to own it much longer. period. if that isn't good enough reason, go back to #1 and #2 and then stop your bitching. it's not any of your business why i choose to run my car with KY jelly if i so choose to do so. and i'm really, really sorry if it makes other bmw owners feel cheap or unworthy. my bad.
/rant (for now)
2. if i'm getting 5mpg more with lower octane, sounds to me like my engine runs better on lower octane anyway
3. supposing #2 isn't true, i will most likely trade my car in within a year for something i like that won't have the mechanical issues this thing seems to have while ON 93 octane. if there are going to be long-term effects of the 87 octane gas in my car, that's fine by me, i don't plan on owning it when that happens. judging by my car's rocky past, i doubt it's going to have any trouble at all with having a bazillion problems completely impertinent to octane levels anyway.
4. i didn't pay anywhere close to 40k for my car, i paid in the 20s. even so, it tickles me how some BMW owners (you) get your panties in a wad by other BMW owners (me) that don't care to follow BMW's "recommendations."
quite frankly, i could have responded and said that my daughter was in a freak accident and my health insurance isn't covering it so i'm trying to save every penny i can, and i would have just made you look like a complete dick for your post. alas, that isn't the truth and i'm not going to lie, but i said it from the start i don't care to hear what bmw recommends, nor do people need to keep insisting that they don't understand how a bmw owner would be cheap. i'm cheap because i don't like my bmw and don't plan to own it much longer. period. if that isn't good enough reason, go back to #1 and #2 and then stop your bitching. it's not any of your business why i choose to run my car with KY jelly if i so choose to do so. and i'm really, really sorry if it makes other bmw owners feel cheap or unworthy. my bad.

/rant (for now)
You've already written of the car so obviously you don't care. When it comes to this gas argument, the amount of savings isn't enough in my opinion to warrant all this testing and discussion sitting in a car that retailed for 70k new. I'd just skip going out to eat ONE evening and bam, all your gas savings right there, now you can run premium gas and live with yourself.
If you're gonna cheap out on gas, and blow off what BMW says, why stop there? Go get those cheapo tires, go for that cheap oil, stretch out your service intervals waaaaaay past what your idrive says, source cheap aftermarket parts to save a buck or two, because after all, 100 years of research got nothing on what you "think" right? You put 87 in your tank and the car still started, BMW must be wrong!!!!!
And where is BMW in all this???? BMW have been known for their engines and you'll see many 80's BMW on the road today. Will you see an E60 in the next 10 yrs....I doubt it.
Not the best resolution and I apologize for all the green but I live on a golf course..AND I think golf is the most senseless of sports I've ever seen. LOL. And start on the steering wheel. I have big hands and I cannot drive the car with the little wheel..and I refuse to take it off and put it on when I take her car during the week. She doesn't mind so neither should you.
BMW needs to put their $ where their mouths are. Don't talk about it, be about it. After 10 yrs with BMW this will be my last BMW. Well at least until I convince my wife to go with a little Mazda or unless i find another BMW at a crazy price/deal etc...
Sure, nothing handles like it but it's not worth what they offer. They continue to spend money to brainwash people and people continue to buy and feed the beast. it's a cycle that will probably continue for a very long time. As long as there is one person out there that is like "Oh wow a BMW? It's so expensive Though!" the image still continues to exist. i am sure their cycle will be critically challenged by a hungry competitor in the near future which will rip BMW wide open.
If you're gonna cheap out on gas, and blow off what BMW says, why stop there? Go get those cheapo tires, go for that cheap oil, stretch out your service intervals waaaaaay past what your idrive says, source cheap aftermarket parts to save a buck or two, because after all, 100 years of research got nothing on what you "think" right? You put 87 in your tank and the car still started, BMW must be wrong!!!!!
research shows the only downside to lower octane gas is that your engine could start knocking. research also shows that bmw's knock sensors are very adept and compensate quite effectively.
As to if BMW allows 87 octane. My wife's 2009 X5 with the N52 6 cylinder engine even says that 87 is allowed.

sounds a lot like the antagonists here need to shut their pie holes if you ask me
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haha, i still think it's funny some of you guys want to target the "being cheap" argument, and yet no one even wants to comment on the fact that i got 5-6 more mpg on 87 octane gas.
how can anyone argue that 93 is better for my car?
how can anyone argue that 93 is better for my car?
So do what works for you, just don't make it seem like you've debunked and exposed BMW and we're all being duped into using premium, BMW doesn't get kickbacks everytime we fill up.
This argument has been had many times before you and will continue until the end of time right along with the which oil is better threads and the like.
People haven't commented because this is not a forum for cheapo's so most here just run the premium and be done with it, we knew what we got into when we bought the car. And plus you have no hard evidence that you're getting better mgg, except for your words. A drive back and fourth means nothing because if you REALLY want a controlled study, conditions and driving style have to be EXACT for both runs. Other than that, who knows. Everything else is just an estimate.
So do what works for you, just don't make it seem like you've debunked and exposed BMW and we're all being duped into using premium, BMW doesn't get kickbacks everytime we fill up.
This argument has been had many times before you and will continue until the end of time right along with the which oil is better threads and the like.
So do what works for you, just don't make it seem like you've debunked and exposed BMW and we're all being duped into using premium, BMW doesn't get kickbacks everytime we fill up.
This argument has been had many times before you and will continue until the end of time right along with the which oil is better threads and the like.
the reality is that bmw has both said use 93 and use 87, so why are you only believing 93 is what they really meant? because they advertise it more, because your owner's manual from 2007 says 93 even though someone else's owner's manual from 2009 says 87 is okay? it's just illogical for you, or vern, or anyone to condemn other people because you cannot push past your fear of disobeying corporate advertisement.
this sounds a lot like a religious argument, no offense. one person says this isn't true and we have some proof, the other person says we don't believe your proof, we have more proof and faith that bmw was right when they said 93.




