[335dsleeper]

^ please post the actual document

[Mik325tds]

Originally Posted by 335dsleeper

That said, I would never run oil this long, especially on a vehicle I plan on keeping for a long time however, I did this time to get some data.

So there you have it. I would love to see 11-12k mile analysis on BMW oil... anyone?

335dsleeper you sound almost apologetic to go 12k miles on an oil change. I really don't get this American cult (no offense intended) that you should do oil changes every 3-5k or 3-6 months . I've always driven full synthetic oils in my cars and my last car (323i) the oil change interval per car reminder was 20kmiles. I used Mobil1 and Amsoil European formula. Sold it with 217kmiles and never had issues with the engine.
I'm going 13kmiles on every oil change with the 335d and used AMS oil LL04 twice so far. Rotella T6 this time around. Oil filters used: Mann, Mahle-Knecht and Hengst. Here's the oil analysis of 13k miles on the AMSoil:

[335dsleeper]

Originally Posted by Mik325tds

335dsleeper you sound almost apologetic to go 12k miles on an oil change. I really don't get this American cult (no offense intended) that you should do oil changes every 3-5k or 3-6 months . I've always driven full synthetic oils in my cars and my last car (323i) the oil change interval per car reminder was 20kmiles. I used Mobil1 and Amsoil European formula. Sold it with 217kmiles and never had issues with the engine.
I'm going 13kmiles on every oil change with the 335d and used AMS oil LL04 twice so far. Rotella T6 this time around. Oil filters used: Mann, Mahle-Knecht and Hengst. Here's the oil analysis of 13k miles on the AMSoil:

I'm not apologetic, it's just I don't see a reason to go that long when it's so cheap to change it. I've run extended oil intervals in previous vehicles and although the oil was still OK according to the test, wear was higher than 5-7k mile changes. In addition, I'm pretty hard on my cars. Whether it's towing to the track or running at the track, the engines get worked to their max. $60-$75 every 5-7k is worth it in my opinion.

[floydarogers]

Originally Posted by 335dsleeper

^ please post the actual document

What, you don't believe me? Of course it does have the universal averages (different than Rotella)

Blackstone 6-14 335d.pdf

[WreckerX5d]

I think it's just because the original numbers you posted were a bit hard to follow in that format.

[335dsleeper]

Originally Posted by floydarogers

What, you don't believe me? Of course it does have the universal averages (different than Rotella)

Attachment 1457401

LOL It's just easier compare on the actual sample.

[floydarogers]

Originally Posted by Wrecker335d

I think it's just because the original numbers you posted were a bit hard to follow in that format.

Just load it into Excel...

Gosh, you guys are hard to please.

[335dsleeper]

Originally Posted by floydarogers

What, you don't believe me? Of course it does have the universal averages (different than Rotella)

Attachment 1457401

After looking at your sample. Both the 12,400 run and the 7,200 run, I'd prefer to stick with Rotella.

[335dsleeper]

Originally Posted by floydarogers

Just load it into Excel...

Gosh, you guys are hard to please.

Thanks for posting it...

[lnxguy]

Oil changes on a diesel every 3-5k does nothing more then piss money away. I can't understand why people think 'new oil = better'.. The soot handling capability of oil gets better over time to a certain extent. If you want to push the envelope then do exactly what 335dsleeper did and send your oil off for analysis, anyone that wants to tell you that you're doing something wrong by running longer OCIs even after looking at that OA needs to pull their head out of the sand. Blackstone even said he could extend the interval even further, lol.

[floydarogers]

Just for grins, here is the diesel OCI discussion thread on bimmerfest, since some of you seem really interested in looking at reports. There are several UOA's posted there, and a few different oils are discussed. Seems that most owners felt that 10K was ok, 13K was time. Most short (5K) change advocates were convinced they were changing too often.

http://www.bimmerfest.com/forums/sho...d.php?t=475850

There's a post containing a pdf from Blackstone of around 80 cars' data that is "interesting". http://www.bimmerfest.com/forums/sho...1&postcount=70

[335dsleeper]

Originally Posted by lnxguy

Oil changes on a diesel every 3-5k does nothing more then piss money away. I can't understand why people think 'new oil = better'.. The soot handling capability of oil gets better over time to a certain extent. If you want to push the envelope then do exactly what 335dsleeper did and send your oil off for analysis, anyone that wants to tell you that you're doing something wrong by running longer OCIs even after looking at that OA needs to pull their head out of the sand. Blackstone even said he could extend the interval even further, lol.

Not sure guys are changing oil every 3-5k. I know I'm comfortable running 5-7k on Rotella. Longer intervals may be fine but, as I've said before, I'm pretty hard on my car and it's pretty cheap insurance. I keep stuff in the garage so it's not much of an inconvenience either.

[rulonger]

The data shared in this thread (and other threads linked herein) has me feeling very comfortable with an OCI of 8 to 10 K miles.

I was using Mobil 1 ESP (LL-04) pre-delete and have now switched to Rotella post-delete.

Thanks for posting the data sheets.

[lnxguy]

Originally Posted by 335dsleeper

Not sure guys are changing oil every 3-5k. I know I'm comfortable running 5-7k on Rotella. Longer intervals may be fine but, as I've said before, I'm pretty hard on my car and it's pretty cheap insurance. I keep stuff in the garage so it's not much of an inconvenience either.

Driving your car hard wouldn't be considered 'severe' duty in which OCIs should be lowered.

City driving, lots of stop and go, extreme temps where the car never fully warms up, etc would be considered severe. Driving the piss out of it (Like you should be doing with any diesel) is considered 'normal'

[Mik325tds]

Originally Posted by lnxguy

Driving your car hard wouldn't be considered 'severe' duty in which OCIs should be lowered.

City driving, lots of stop and go, extreme temps where the car never fully warms up, etc would be considered severe. Driving the piss out of it (Like you should be doing with any diesel) is considered 'normal'

While I agree with you that driving a car that never really warms up is bad for the oil because it collects condensation moisture, I do think that track days with long full fueling acceleration runs do put some strain on the oil since it is going through very hot turbos. There's been an oil comparison around that the Castrol Edge is actually extremely good at the TEOST test. Too bad that T6 is not in that comparison. I'd have like to see its results in these tests.

[RollingCoal]

Here is a document where Delo did some test comparisons which includes Rotella T6

[335dsleeper]

Originally Posted by Mik325tds

While I agree with you that driving a car that never really warms up is bad for the oil because it collects condensation moisture, I do think that track days with long full fueling acceleration runs do put some strain on the oil since it is going through very hot turbos. There's been an oil comparison around that the Castrol Edge is actually extremely good at the TEOST test. Too bad that T6 is not in that comparison. I'd have like to see its results in these tests.

It's not just road courses. 1/4 mile runs also develop a lot of heat that doesn't get dispersed like on a road course.

[RollingCoal]

Originally Posted by 335dsleeper

It's not just road courses. 1/4 mile runs also develop a lot of heat that doesn't get dispersed like on a road course.

Yep, 1/4 mile runs are the ultimate stop & go driving....very demanding on oil.

[lnxguy]

Originally Posted by Mik325tds

While I agree with you that driving a car that never really warms up is bad for the oil because it collects condensation moisture, I do think that track days with long full fueling acceleration runs do put some strain on the oil since it is going through very hot turbos. There's been an oil comparison around that the Castrol Edge is actually extremely good at the TEOST test. Too bad that T6 is not in that comparison. I'd have like to see its results in these tests.

If people are doing multiple track days, I'd probably lump that into the severe duty category. I was referring more to beating on the car during your daily commute

It would be nice to see all oils tested under the same circumstances. So much voodoo when it comes to this stuff (Remember Duralube? lol)

[335dsleeper]

Originally Posted by lnxguy

If people are doing multiple track days, I'd probably lump that into the severe duty category. I was referring more to beating on the car during your daily commute

It would be nice to see all oils tested under the same circumstances. So much voodoo when it comes to this stuff (Remember Duralube? lol)

The oil in my 335d has 25-30 1/4 mile passes on it. Probably has another 20 or 4th gear pulls and countless WOT runs through the gears... I'd think its teetering on severe use.

[lnxguy]

Originally Posted by 335dsleeper

The oil in my 335d has 25-30 1/4 mile passes on it. Probably has another 20 or 4th gear pulls and countless WOT runs through the gears... I'd think its teetering on severe use.

If you were doing that in -30 degree temps or in the desert in a dust storm I might agree with you, lol. But really man, WOT pulls aren't doing anything to your oil. You want severe duty, go sit in stop and go traffic for 4-5 hours a day, or do cold starts for 6 months in -20 degree temps. That's what the oil companies consider 'severe' duty. I know everytime I get in my car it's going WOT at some point, nothing I'd consider abnormal or severe about that.

[335dsleeper]

^ so 13k mile oil changes for you then?