BMW M3 Forum (E90 E92)

BMW Garage BMW Meets Register Search Today's Posts Mark Forums Read


Go Back   M3Post - BMW M3 Forum > E90/E92 M3 Technical Topics > Mechanical Maintenance: Break-in / Oil & Fluids / Servicing
 
E92-lighting
Post Reply
 
Thread Tools Search this Thread
      08-07-2013, 08:50 AM   #23
W///
Major General
W///'s Avatar
84
Rep
5,398
Posts

 
Drives: 2008 E92 M3/1999 E36 M3 Coupe
Join Date: Sep 2011
Location: SC

iTrader: (12)

Quote:
Originally Posted by Lute View Post
Of course, it is the future, you can get more power with the same or better gas mileage, the issue is how do you address valve maintanance going forward. Thankfully the s65 is port injected so these are issues I don't have to stress for now
+1

That and the other car I want, a 997 Turbo. No DI for me yet
__________________
2008 E92 M3: Sparkling Graphite | Bamboo Beige | 6MT | CF Roof | HRE | Catless Eisenmann Race | BPM Sport | Swift | Arkym | Mode Carbon | M.Perf
Appreciate 0
      08-07-2013, 11:55 AM   #24
happos2
Dingleberries
18
Rep
1,182
Posts

 
Drives: Gray E92 M3
Join Date: May 2012
Location: Indiana

iTrader: (3)

Quote:
Originally Posted by Lute View Post
It's really quite simple. Standard engines use port injection which sprays fuel "over" the intake valves where the gasoline additives such will help keep injectors and valves clean.

Direct injection sprays fuel "under" the intake valves directly into the combustion chamber. Fuel additives and cleaners will do nothing to clean valves in this case only the injectors. The only way to clean valves on a direct injection engine is to remove the head and manually clean the valves.

To answer why they use direct injection, main reason is better metering of the fuel air mixture which improves fuel efficiency and MPG.

Attachment 897040
Thanks for the picture! I learned something today!!
Appreciate 0
      08-07-2013, 12:06 PM   #25
Z K
Colonel
Z K's Avatar
United_States
26
Rep
2,174
Posts

 
Drives: E90 M3, MK6 GLI
Join Date: Jul 2011
Location: San Francisco

iTrader: (3)

Quote:
Originally Posted by Lute View Post
Of course, it is the future, you can get more power with the same or better gas mileage, the issue is how do you address valve maintanance going forward. Thankfully the s65 is port injected so these are issues I don't have to stress for now
It is mostly addressed in the new cars now. Toyota, Honda, Nissan, Mazda etc. all are using DI in their engines now. Given their reputation for reliable cars, they have to have figured this out otherwise there would be a ton of complaints given the amount of Hondas and Toyotas that are on the road.
__________________
Auto Detailing Enthusiast!
Appreciate 0
      08-07-2013, 04:16 PM   #26
whats77inaname
Native Texan
United_States
54
Rep
1,874
Posts

 
Drives: when at all possible
Join Date: Aug 2011
Location: Tx

iTrader: (16)

http://www.audizine.com/forum/showth...-up-Megathread

Given the stable of brands under VW AG, I'd be curious to see how DI is treating some of their other cars after a couple years of service.
Appreciate 0
      08-07-2013, 06:25 PM   #27
TheGulf1
Wayne
United_States
0
Rep
18
Posts

 
Drives: 2011 E92 M3
Join Date: Jul 2013
Location: Baton Rouge

iTrader: (0)

Although Seafoam is used in fuel, it's also used in the crankcase. I think that might have been what the OP was talking about. I've used it a long time in my cars (mainly older cars with more miles) and it's great stuff. Just my opinion though that I'll stick with the recommended oil, change every other interval myself (let BMW pick up the other), and buy the best fuel I can get locally. I'm going to leave the additives out of mine.
Appreciate 0
      08-08-2013, 08:31 AM   #28
Radiation Joe
Veni Vidi Vici
Radiation Joe's Avatar
United_States
37
Rep
2,749
Posts

 
Drives: '11 JB/BBe-6sp-e90
Join Date: Jul 2008
Location: Macungie PA

iTrader: (0)

Garage List
2011 e90 M3-Sold  [4.25]
2003 RS6 - Sold  [0.00]
2009 e90 M3 - Gone  [0.00]
2003 M3 SOLD  [0.00]
old 2002  [5.00]
I've used Seafoam in the past. I was happy with it. The OP is on the east coast and probably runs Shell or Sunoco fuel. I don't believe either of these fuels have Techron in their additive packages. Techron would be a good choice as someone else recommended. I alternate between that and Redline Fuel Injector cleaner. I also alternate between Shell and Sunoco to take advantage of their differing detergent formulations.
__________________

Dinan compliment of stuff plus PF rotors and RG63s. Enough for now.
Why, yes. I am an abrasive bastard.
Appreciate 0
Post Reply

Bookmarks

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -5. The time now is 04:02 PM.




m3post
Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST