BimmerFest BMW Forum banner

1 - 20 of 108 Posts

·
Freedom isn't free!!
2018 Glacier Silver 340i M Sport
Joined
·
19,936 Posts
Discussion Starter · #1 ·
I got some interesting information first hand recently. I was at my local dealer and was talking with one of the mechanics. He had just pulled the valve cover off of an X3 3.0si, 260 hp/N52 engine to check its condition.

BMW has a requirement that the vehicle service history must show at least two oil services before it can be CPO'd. If it doesn't show that the dealership has to pull the valve cover and take pictures of the internals and send them to BMW to get their OK to CPO the car.

This X3 had just come back from a three year lease to a little old lady who only drove it to the grocery store on Saturday and church on Sunday. It had about 23,000 miles on it. She only drove it about 7,500 miles per year. So, it was two years old before it hit 15k miles and had its first oil change. Then it was driven another 7,500 miles or so. So, when it came in it had only one oil change in three years.

I'm just speculating here, but I imagine this X3 had lots of short, stop and go trips where the engine did not fully warm up and very few highway miles. Just the sort of driving you'd think might be a recipe for at least some sludge build up.

Now this engine had only been run with BMW High Performance Synthetic oil, of course. The inside of the engine, all the internals you could see with the valve cover off, looked like it was brand new. You could have eaten off of it. The mechanic told me this is what every engine he's inspected in this type scenario has looked like. He has never had any sludge or other build-up.

Anyway, I thought y'all might find that a little interesting. I was certainly impressed. Of course, this wasn't a turbo engine (though it is the same engine I have in my E90 330i :D ), but seeing that gave me some sense that BMW's long oil change intervals are not entirely a bad thing. Which I guess is really nothing terribly new, because they've had long intervals at least since the E46 first came out. (Sorry, I'm not up on E36s. :) )

So, there you go. Now y'all can cuss and discuss what are your thoughts.
 

·
Freedom isn't free!!
2018 Glacier Silver 340i M Sport
Joined
·
19,936 Posts
Discussion Starter · #3 ·
Hi i'mm from south africa and her we dont like long service intervals
check pic's, done have much more info but its an x6 3.5i
That looks nasty. Do you have any details? How long between changes? What kind of oil?
 

·
Philosopher-king
Joined
·
2,195 Posts
BMW has a requirement that the vehicle service history must show at least two oil services before it can be CPO'd. If it doesn't show that the dealership has to pull the valve cover and take pictures of the internals and send them to BMW to get their OK to CPO the car.
BMW requires dealers to spend several hours removing the cam covers, replacing all the seals and gaskets, and reassembling everything without any oil leaks for a CPO?

I didn't know that.
 

·
Philosopher-king
Joined
·
2,195 Posts

·
Not Here Anymore
Joined
·
5,203 Posts
Anyway, I thought y'all might find that a little interesting. I was certainly impressed. Of course, this wasn't a turbo engine (though it is the same engine I have in my E90 330i :D ), but seeing that gave me some sense that BMW's long oil change intervals are not entirely a bad thing. Which I guess is really nothing terribly new, because they've had long intervals at least since the E46 first came out. (Sorry, I'm not up on E36s. :) )

So, there you go. Now y'all can cuss and discuss what are your thoughts.
Problems related to infrequent oil changes seem to be rare. I don't think I've ever read about such a situation here but I know my mechanic has repaired a couple of cars due to infrequent oil changes (in the neighborhood of 60K miles without a change, IMO exceptional cases).

With that said I like to change my oil more frequently than BMW's recommendation as it's low cost with no downside. I wish BMW allowed me to change the reminder interval in the computer to be something other than the 15K miles.
 

·
Registered
Joined
·
53 Posts
From everything I've learned over the years, the oil change interval is dependent on a whole lot of conditions. Obviously, the newer the engine, the less often you need to change it, because there is less contaminants and engine wear that needs to be cleaned. Basically, the oil is good as long as it still has the correct properties as well as cleaning agents left in it. There is no way to know this information without analyzing the oil in a lab. For most situations, 10-15k miles is perfectly fine for synthetic oils. The part that wears out before the oil is the oil filter. Most of the guys who are really into analyzing their oil have suggested changing the filter halfway through a long oil change interval, eg 7.5k filter change for a 15k oil change interval.

BMW does have oil changes annually if you do not reach the 15k mile count. I may be mistaken, but there is a more complicated formula used behind the scenes to calculate when an oil change is needed. This is based on how you drive the vehicle. Most of the newer cars use this type of thing to calculate oil change requirements.
 

·
Registered
Joined
·
1,269 Posts
You can drive thousands of miles on a motor with 1Q missing in the oil capacity and have no issues what so ever....
 

·
Registered
Joined
·
493 Posts
..I thought all the dealer had to do to CPO a car was paint "CPO" on the windshield ! :rofl::rofl: people will believe anything
 

·
Bad Lieutenant
Joined
·
6,358 Posts
I'm guessing she at least got to operating temperature and there was some freeway involved. 7500/year is what I drive and my 70 year old mom drives 3k/year (Mini S). I think you hit a good point that this isn't a turbo motor as well but water/moisture is probably the worst enemy, that's why I think it got to a temp to evaporate the water captured. N52 is a great engine, now that the lifter tick has been addressed I hope it continues.
 

·
BMWCCA 149159
Joined
·
2,876 Posts
Texas seldom gets below freezing so even short drives would most likely flash any condensation off. Synthetic oil is great and the tighter tolerances of todays engines not just BMWs allows for longer oil changes because the contamination doesn't occur as often and the total base numbers (TBNs) don't fall below what still protects the engine.

I have a BMW M3 that now has 278K miles on the engine and has lived in Phoenix and Florida its entire life. I pulled the head at 274K miles and everything looked excellent. However this was most likely ideal places to help long life with climates that almost never see low temps and drives that are always long enough to flash off any condensation.

Brett Anderson who operates Kola Motor Sports in Columbus Ohio used to show on his web site what happens to E46 engines on these extended oil changes. They were terribly sludges up. Might be because of the climate and short drives not burning off the condensation. Might not but regardless BMW legal made him pull those pictures.

Oil changes are cheap compared to replacing an engine. I would strongly consider changing oil more often if you live in climates where you get a lot of below freezing temps.
 

·
Registered
Joined
·
45 Posts
Amsoil extended changes

Amsoil has been doing extended oil changes for years, 1 year or up to 40,000 miles with their top oil! They make 5w-40 and 5w-30 euro oils, and use Mann filters for BMW, all approved and meet their requirements! Its all I use in all my engines!
 

·
Registered
Joined
·
13,568 Posts
I got some interesting information first hand recently. I was at my local dealer and was talking with one of the mechanics. He had just pulled the valve cover off of an X3 3.0si, 260 hp/N52 engine to check its condition.

BMW has a requirement that the vehicle service history must show at least two oil services before it can be CPO'd. If it doesn't show that the dealership has to pull the valve cover and take pictures of the internals and send them to BMW to get their OK to CPO the car.

This X3 had just come back from a three year lease to a little old lady who only drove it to the grocery store on Saturday and church on Sunday. It had about 23,000 miles on it. She only drove it about 7,500 miles per year. So, it was two years old before it hit 15k miles and had its first oil change. Then it was driven another 7,500 miles or so. So, when it came in it had only one oil change in three years.

I'm just speculating here, but I imagine this X3 had lots of short, stop and go trips where the engine did not fully warm up and very few highway miles. Just the sort of driving you'd think might be a recipe for at least some sludge build up.

Now this engine had only been run with BMW High Performance Synthetic oil, of course. The inside of the engine, all the internals you could see with the valve cover off, looked like it was brand new. You could have eaten off of it. The mechanic told me this is what every engine he's inspected in this type scenario has looked like. He has never had any sludge or other build-up.

Anyway, I thought y'all might find that a little interesting. I was certainly impressed. Of course, this wasn't a turbo engine (though it is the same engine I have in my E90 330i :D ), but seeing that gave me some sense that BMW's long oil change intervals are not entirely a bad thing. Which I guess is really nothing terribly new, because they've had long intervals at least since the E46 first came out. (Sorry, I'm not up on E36s. :) )

So, there you go. Now y'all can cuss and discuss what are your thoughts.
Yes, I did find this interesting.

As usual for you, another great contribution to Bimmerfest!!:thumbup:
 

·
N54
Joined
·
3,427 Posts
Amsoil has been doing extended oil changes for years, 1 year or up to 40,000 miles with their top oil! They make 5w-40 and 5w-30 euro oils, and use Mann filters for BMW, all approved and meet their requirements! Its all I use in all my engines!
No, they are not approved. BMW does not approve Amsoil oil, regardless of the cleverly written ambiguity written on Amsoil containers
 

·
N54
Joined
·
3,427 Posts
BMW uses Castrol.
That's not useful info either. Be more specific.

Synthetic Engine Oils

BMW High Performance Synthetic Oil is recommended for scheduled engine oil changes.

BMW High Performance SAE 5W-30 Synthetic Oil* (BMW part number 07 51 0 017 866)
* Does not apply to M vehicles - see below

The oils listed below meet BMW's Long-life rating and are acceptable for use in BMW Passenger vehicles and SAVs in the US market with gasoline engines.

BMW Long-life rating LL-01 Approved Synthetic Oils for the US Market:

* Castrol Syntec European Formula SAE 0W-30

* Mobil 1 SAE 0W-40

* Pennzoil Platinum European Formula Ultra SAE 5W-30

* Valvoline SynPower SAE 5W-30
http://www.bmwusa.com/Standard/Content/Owner/SyntheticEngineOils.aspx
 

·
Registered
Joined
·
45 Posts
LL 04 (Amsoil)

Good for 335 (N54) motors 5w-30 enhanced for turbos. Low TBN # if using ethanol possible concern if any, however Shell V power in Canada contains no ethanol. Plus Amsoil is a true synthetic PAO not cheaper Hydro cracked base stocks.
 

·
Registered
Joined
·
753 Posts
The reminder interval on my 335i is 17K miles. I hear people talking about the 15K reminders and wonder what gives. Maybe the dealer reset it? Anyone else have 17K reminder interval?
 

·
Registered
Joined
·
3,039 Posts
The reminder interval on my 335i is 17K miles. I hear people talking about the 15K reminders and wonder what gives. Maybe the dealer reset it? Anyone else have 17K reminder interval?
15k is only an average. The actual interval is dependent upon your driving conditions.

Look up "Condition Based Service" in your owner's manual.

Tom
 

·
Don't Judge Me!
Joined
·
4,429 Posts
I am off that hook... I change my oil every 7,500 miles.
 
1 - 20 of 108 Posts
Top