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      03-13-2014, 07:30 PM   #45
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Originally Posted by dbs600 View Post
Don’t know what to say!

Brought my car back to my dealer a week ago and today they called to state they opened a PUMA case and that I’ll be out of my car for at least another two weeks, as they need to replace timing chains for both cylinder banks, as well as my engine's head gaskets!

Anyone have any idea what’s going on here? :|
What's a PUMA case?
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      03-14-2014, 12:54 AM   #46
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Originally Posted by skypx View Post
What's a PUMA case?
https://www.bimmerfest.com/forums/sh...d.php?t=349739
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      03-14-2014, 08:31 AM   #47
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Originally Posted by skypx View Post
Yes. Some may say it's inconvenient, but now we are not searching for Shell gas stations and our car are not choking on horrible winter gas!
Is this only to improve mileage?I am getting ~ 18+mpg on my new 750lix.I am not driving it crazy though as its still in the initial 2500miles.If it prevents any carbon build up I would like to give it a try.
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      03-14-2014, 08:48 AM   #48
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Originally Posted by luvthestck View Post
Is this only to improve mileage?I am getting ~ 18+mpg on my new 750lix.I am not driving it crazy though as its still in the initial 2500miles.If it prevents any carbon build up I would like to give it a try.
Both. It improves mileage and cleans the fuel system.
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      03-14-2014, 03:57 PM   #49
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Service manager states its increasingly common to see stretched timing chains on the V8's, which leads to improper timing, which leads to poor fuel economy. Very disturbing to see my engine apart with only 30k miles.

Walked by four other cars (one 7, two X5's and one X6) that supposedly have the same problem and are in line ahead of my car waiting for repairs; there were another 2 'blown' engines on the ground in another area; so many engines out!?

Didn't get a straight answer why my injectors and plugs were replaced two weeks ago if this is the true culprit... :|
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      03-18-2014, 07:48 AM   #50
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Originally Posted by TXSTYLE View Post
I'm already using it as of Saturday! We shall see...
Hey TXSTYLE, any updates?
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      03-18-2014, 09:22 AM   #51
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Originally Posted by skypx View Post
Hey TXSTYLE, any updates?
So the previous Saturday/10 days ago, I put in both the Archoil fuel and oil treatment. Even though I use Royal Purple every 4k miles. Keep in mind I drive VERY little! I'm still on the tank from when I filled up then. I will say there appears to be smoothing out taking place. Particularly on startup. Also, I didn't even think to monitor my own mpg that often until this thread. And I too am not happy at all with my mpg in the limited driving I do. I wonder how accurate our on board cluster reading is? Because if it's accurate, then I'm only averaging 10.5 which has increased to 11.
I plan on taking the car in soon just to see what the dealer says once they uhhm run their tests.

I believe EVERYONE should be monitoring their own mpg immediately and report results here!

I'm also using a 'scan tool' that sends all data to my Android.
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      03-18-2014, 09:28 AM   #52
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Quote:
Originally Posted by TXSTYLE View Post
So the previous Saturday/10 days ago, I put in both the Archoil fuel and oil treatment. Even though I use Royal Purple every 4k miles. Keep in mind I drive VERY little! I'm still on the tank from when I filled up then. I will say there appears to be smoothing out taking place. Particularly on startup. Also, I didn't even think to monitor my own mpg that often until this thread. And I too am not happy at all with my mpg in the limited driving I do. I wonder how accurate our on board cluster reading is? Because if it's accurate, then I'm only averaging 10.5 which has increased to 11.
I plan on taking the car in soon just to see what the dealer says once they uhhm run their tests.

I believe EVERYONE should be monitoring their own mpg immediately and report results here!

I'm also using a 'scan tool' that sends all data to my Android.
Is this 100% city driving? Also how much Archoil AR6200 did you put in? The manufacturer recommends twice the normal amount for the first treatment.
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      03-18-2014, 09:55 AM   #53
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Is this 100% city driving? Also how much Archoil AR6200 did you put in? The manufacturer recommends twice the normal amount for the first treatment.
An occasional hwy sprint but mostly town driving. I forgot about using extra initially. next fill up coming this week I will add more.
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      03-18-2014, 10:07 AM   #54
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An occasional hwy sprint but mostly town driving. I forgot about using extra initially. next fill up coming this week I will add more.
I made the same mistake initially. I do think its odd you're getting worst MPG compared to a M5. Maybe it's the extra weight?
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      03-18-2014, 10:23 AM   #55
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I made the same mistake initially. I do think its odd you're getting worst MPG compared to a M5. Maybe it's the extra weight?
Bro I've read of guys getting 8mpg in this car!

Several factors are at work here: There is the notorious 'carbon buildup' from direct injection design, weight, twin turbos, and who knows what else.

It's a "love.hate" relationship I've developed for BMW. But at some point, enough will be enough....

Again... All of you "lurkers" who have a 7, go in and monitor your daily mpg's. Post up the results here. You may be SHOCKED...
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      03-18-2014, 10:34 AM   #56
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Forgot to ask, did you reset the trip computer after adding archoil 6200?
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      03-18-2014, 10:52 AM   #57
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Quote:
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Forgot to ask, did you reset the trip computer after adding archoil 6200?
No. Any benefit?
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      03-18-2014, 11:14 AM   #58
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Quote:
Originally Posted by TXSTYLE View Post
No. Any benefit?
You're killing me TXSTYLE! Yes, it makes a difference. It wasn't reset so the car is calculating the average MPG before and after adding archoil 6200.

I know you're a busy guy, but can you please add 15mls and fill the tank + reset the trip computer? Then we should see how it truly performs. Thanks.
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      03-18-2014, 11:28 AM   #59
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Ha! My bad. Will do.
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      04-05-2014, 07:30 AM   #60
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Ha! My bad. Will do.
Any updates TXSTYLE?
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      04-05-2014, 11:26 AM   #61
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Quote:
Originally Posted by skypx View Post
Any updates TXSTYLE?
Honestly... The fuel economy not so much as of yet.
But the car is idling much smoother! Particularly on cold starts!
I am actively running a scan tool and have monitored a couple of misfires. That I'm sure had to do with all this carbon buildup we are hearing about or possibly clogged plugs?
I will continue to update.... But thanks for the info. I will be using it for sure and already recommended it.
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      04-07-2014, 10:50 AM   #62
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Quote:
Originally Posted by TXSTYLE View Post
Honestly... The fuel economy not so much as of yet.
But the car is idling much smoother! Particularly on cold starts!
I am actively running a scan tool and have monitored a couple of misfires. That I'm sure had to do with all this carbon buildup we are hearing about or possibly clogged plugs?
I will continue to update.... But thanks for the info. I will be using it for sure and already recommended it.
Hey TXS, Were u using techron before this? Did it help at all.

I just clocked 2500 miles on my 750lix and the onboard comp says Mileage 19.2mpg.There is quite a bit of high way miles in that though.
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      04-07-2014, 11:39 AM   #63
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Quote:
Originally Posted by TXSTYLE View Post
Honestly... The fuel economy not so much as of yet.
But the car is idling much smoother! Particularly on cold starts!
I am actively running a scan tool and have monitored a couple of misfires. That I'm sure had to do with all this carbon buildup we are hearing about or possibly clogged plugs?
I will continue to update.... But thanks for the info. I will be using it for sure and already recommended it.
Thanks for the update.
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      04-07-2014, 11:41 AM   #64
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Quote:
Originally Posted by luvthestck View Post
Hey TXS, Were u using techron before this? Did it help at all.

I just clocked 2500 miles on my 750lix and the onboard comp says Mileage 19.2mpg.There is quite a bit of high way miles in that though.
I did, but not as a habit. I had a interesting convo with a mechanic and he said the key to longevity to these cars/engines: "quality fuel system cleaner every month and much more frequent Oil Changes than recommended like every 4k miles."
I use the 4k rules anyway just because clean fresh oil helps ANY car!
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      04-29-2014, 07:26 AM   #65
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I have a pre-LCI 2011 730d M Sport (UK model), currently on 33k miles.

MPG currently around 33.4, I've done 350 miles on just over half a tank (roughly 2/5 full now).

I know it's not the 750 models you guys inthe states have, but it's interesting because it's about 8-9 MPG less than the manufacturer states for the type of driving I do.

The LCI 730d (2012 onwards, I think) states over 50MPG combined with its new 8-speed auto gearbox, which I am very envious of.

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      04-29-2014, 11:47 AM   #66
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I'd really like to hear from MANY more of you who are reading this thread,,,

THIS is a VERY troubling and serious issue guys!!! I believe we ALL can benefit from knowing just how "accurate" fellow owners MPG really are...

I have gained a modest increase over the past month. But if you can call 11.8 averaging modest or good... I may as well be driving a LAMBORGHINI!
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