How the computer knows when to change oil, filter...
06-18-2009, 02:57 AM
#1
Members
Thread Starter
Join Date: May 2009
Posts: 7
Likes: 0
Received 0 Likes
on
0 Posts
I am wondering how the computer know when you should change oil, filter... things? By senors or purely by calculating how long you have driven?
If I reset oil change...filter things without actually changed them, can computer still ask you to change?
cheers
If I reset oil change...filter things without actually changed them, can computer still ask you to change?
cheers
06-18-2009, 04:05 AM
#4
Members
Thread Starter
Join Date: May 2009
Posts: 7
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by borisnewn' post='915555' date='Jun 18 2009, 06:46 AM
it actually doesnt know, it is an estimate from alot of research and development =]
thanks. So the computer doesn't even know the quality of the oil.
06-18-2009, 04:12 AM
#5
Contributors
Join Date: Dec 2008
Posts: 4,656
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by Greenwich09' post='915564' date='Jun 18 2009, 08:05 AM
thanks. So the computer doesn't even know the quality of the oil.
06-18-2009, 04:40 AM
#6
Contributors
Join Date: Mar 2009
Location: OK
Posts: 606
Likes: 0
Received 1 Like
on
1 Post
My Ride: 540i
Model Year: 2017
Originally Posted by craigm1841' post='915567' date='Jun 18 2009, 07:12 AM
it is done by milage, as i stated. somewhere along the way, the oil change intervals were programmed into the computer based on research done to determine the best milage at what oil should be changed under typical driving conditions.
"typical driving conditions"....who does that?
short commutes won't allow the oil to get to a temp where it can evaporate moisture condensed in the crankcase=change more often
stop and go driving, extended engine idling allows contamination from blow by=change more often
extended revs, driving hard generates more heat and breaks the oil down faster=change more often
Synthetics have come a long way to combat the above issues, but, fresh oil is a cheap investment!
06-18-2009, 04:43 AM
#7
Contributors
Join Date: Dec 2008
Posts: 4,656
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by 530inOK' post='915582' date='Jun 18 2009, 08:40 AM
+1
"typical driving conditions"....who does that?
short commutes won't allow the oil to get to a temp where it can evaporate moisture condensed in the crankcase=change more often
stop and go driving, extended engine idling allows contamination from blow by=change more often
extended revs, driving hard generates more heat and breaks the oil down faster=change more often
Synthetics have come a long way to combat the above issues, but, fresh oil is a cheap investment!
"typical driving conditions"....who does that?
short commutes won't allow the oil to get to a temp where it can evaporate moisture condensed in the crankcase=change more often
stop and go driving, extended engine idling allows contamination from blow by=change more often
extended revs, driving hard generates more heat and breaks the oil down faster=change more often
Synthetics have come a long way to combat the above issues, but, fresh oil is a cheap investment!
06-18-2009, 05:24 AM
#8
Contributors
Join Date: Mar 2009
Location: OK
Posts: 606
Likes: 0
Received 1 Like
on
1 Post
My Ride: 540i
Model Year: 2017
Originally Posted by craigm1841' post='915583' date='Jun 18 2009, 07:43 AM
typical drivers do. you dont... if you were a typical driver you wouldnt be posting on a BMW enthusiast forum right now.
06-18-2009, 08:33 AM
#9
Members
Join Date: Nov 2008
Location: So. Utah
Posts: 70
Likes: 0
Received 0 Likes
on
0 Posts
My Ride: 04 545i Sport Pkg, Cold Weather, Nav
From what my SA told me it is based on a few variables. Gas consumption - meaning more fuel consumption = hard driving and quicker breakdown of oil, also total mileage driven is factored in as well. But there is no type of sensor or equipment that senses the quality of the oil.
I still dont go past 7k between oil changes, the factory 15k changes is a tad too much for me.
I still dont go past 7k between oil changes, the factory 15k changes is a tad too much for me.
06-18-2009, 08:41 AM
#10
Contributors
Join Date: Dec 2005
Location: Chippenham, Wiltshire UK
Posts: 1,261
Likes: 0
Received 0 Likes
on
0 Posts
My Ride: F11 535i M-Sport,, Silver, Black Leather, LED Adaptive headlights
Model Year: 2015
Engine: N55
They start with a planned mileage. The they build an algorythm into the car computer that monitors number of starts, cold starts, factors from the engine temp and a host of other factors. This algorthym then modifies the planned mileage change figure up of down according to how it calculates the car use will have affected the oil.