[HighlandPete]

Originally Posted by 6IX-F10-N52

thats the perfect mileage for an oil change considering you have a highway car. do you think its a good idea to change the oil filter halfway through the interval, is it dirty when you pull it out? i changed my filter with the oil together after roughly 5000 miles but im looking for opinions on this. thanks alot

Most users in the UK run to the CBS regime and that can be over 20,000 miles/2-years, between oil services, whichever comes first. And that is even in a 'dirty' diesel.

Most engines have no issues, even running well over the 100,000 mile mark.

For those who change oil so often, what mileages do you intend to run them to, 200,000 miles or more in your ownership?

As to the comments on break-in. Over here many of the oil burning engines are traced to not being broken in hard enough. Applies to a lot of diesel motors where users have decent performance without using revs, so oil control never gets sorted, glazing rather than bedded in properly. Those who "use" their engines, typically have the engines which doesn't burn oil.

BTW. I agree with break-in periods, but not too soft, they need some decent work, (without abuse) to bed them in properly.

[insanecoder]

Originally Posted by HighlandPete

Most users in the UK run to the CBS regime and that can be over 20,000 miles/2-years, between oil services, whichever comes first. And that is even in a 'dirty' diesel.

Most engines have no issues, even running well over the 100,000 mile mark.

For those who change oil so often, what mileages do you intend to run them to, 200,000 miles or more in your ownership?

As to the comments on break-in. Over here many of the oil burning engines are traced to not being broken in hard enough. Applies to a lot of diesel motors where users have decent performance without using revs, so oil control never gets sorted, glazing rather than bedded in properly. Those who "use" their engines, typically have the engines which doesn't burn oil.

BTW. I agree with break-in periods, but not too soft, they need some decent work, (without abuse) to bed them in properly.

I plan to see 200,000mi+.
and I agree with you break-in has to be done right and the rings need to expand under pressure in order to do so

[HighlandPete]

Originally Posted by insanecoder

I plan to see 200,000mi+.
and I agree with you break-in has to be done right and the rings need to expand under pressure in order to do so

I see the benefit to long term owners, I personally have doubts with the 20,000 mile oil services, particularly if not driven a majority of highway miles. I've gone for interim changes on my N55 engine, so about 8 - 9,000 miles, or one year.

[insanecoder]

Originally Posted by HighlandPete

I see the benefit to long term owners, I personally have doubts with the 20,000 mile oil services, particularly if not driven a majority of highway miles. I've gone for interim changes on my N55 engine, so about 8 - 9,000 miles, or one year.

Logical.. I assume 20,000 is for the diesel engines of which I have no experience with. Any kind of hard-driving or hard conditions should reduce the interval of changing fluids.
See you at 200,000

[1987E30M3]

There are break in fluids in the oil from the factory, I would personally wait until 5,000 miles to change the oil.

[Billfitz]

Originally Posted by 6IX-F10-N52

do you think its a good idea to change the oil filter halfway through the interval, is it dirty when you pull it out?

I changed my filter a month ago, at about 3,000 miles. The oil was clean, the filter was filthy, which is as it should be, as cleaning the crud out of the oil is what it's there for. If I'd found the filter to be clean then I'd rethink changing it at such a low mileage, but seeing how dirty it was told me I'd made the right decision.

[STR8-6IX]

Originally Posted by Billfitz

I changed my filter a month ago, at about 3,000 miles. The oil was clean, the filter was filthy, which is as it should be, as cleaning the crud out of the oil is what it's there for. If I'd found the filter to be clean then I'd rethink changing it at such a low mileage, but seeing how dirty it was told me I'd made the right decision.

wouldnt the filter just get dirty again since the oil wasnt fresh? this is why im debating if its worth it or not because i dont have the tool to unscrew my filter cap thing.

[Billfitz]

Originally Posted by 6IX-F10-N52

wouldnt the filter just get dirty again since the oil wasnt fresh?

The filter I replaced got dirty, and it was installed when the oil was. Like I said, the purpose of the filter is to keep the oil clean. In order to do that the filter will get dirty. Is it worth it? Maybe, maybe not, but ten bucks every six months isn't going to break my budget.

[HighlandPete]

Originally Posted by insanecoder

Logical.. I assume 20,000 is for the diesel engines of which I have no experience with. Any kind of hard-driving or hard conditions should reduce the interval of changing fluids.
See you at 200,000

Petrol engines over here are on a similar CBS regime to diesel, mine would be something like 18,000 miles between oil services, if left to CBS regime.

Diesel is typically far dirtier inside than a petrol engine. Far more carbon in the oil, oil will be dirty to look at in a few miles after a change.

[HighlandPete]

Originally Posted by Billfitz

The filter I replaced got dirty, and it was installed when the oil was. Like I said, the purpose of the filter is to keep the oil clean. In order to do that the filter will get dirty. Is it worth it? Maybe, maybe not, but ten bucks every six months isn't going to break my budget.

I've a family member who had a career as a tribologist, he always reckoned the filter was the thing to change if folks were concerned about improving oil performance. Changing the filter at half oil change intervals is more important (IMO), than changing the oil so often, as you guys seem to do.

[insanecoder]

Originally Posted by HighlandPete

I've a family member who had a career as a tribologist, he always reckoned the filter was the thing to change if folks were concerned about improving oil performance. Changing the filter at half oil change intervals is more important (IMO), than changing the oil so often, as you guys seem to do.

Yes esp with synthetics I've noticed the filter loses its capacity before the oil ever gets bad

[Billfitz]

Originally Posted by HighlandPete

Changing the filter at half oil change intervals is more important (IMO), than changing the oil so often...

Either method is going to give you cleaner oil, but changing filters is a lot cheaper than changing oil, not to mention easier.

[CIWS]

Half BMW cycle change of the oil and filter only costs about 100.00 here from the dealership. It's added piece of mind and I let the dealership do it because if there's ever an engine issue they have the record of oil/filter changes and when they were done.

[odus]

Its funny seeing the wear analysis on these cars and what is considered normal. Its part of my job to test oil samples on Jet and turbine engines and the wear limits are so low compared to a car obviously just makes you chuckle when people have it done on a car with not many mods.

[STR8-6IX]

Originally Posted by rak299

What do you think about an early oil change, after 1000 miles or so? (New F32 440 xDrive) Is there a benefit?

it would only make sense to change oil early if the car is brand new, 3000miles in as soon as the engine is past the break-in stage. this way, you get rid of all the metal shavings early on in the cars life.