KLS

"Good wear metal results. Zinc and Phosp looks good. But, terrible viscosities for <2,400 miles. That oil is shearing down just like the crappy Mobil 0W40 does. That oil would NEVER last 10K miles, let alone 5K."

Any thoughts on why? This is my first analysis but Motul usually fares pretty well on viscosity I think. Would the Ceratec contribute to that?

cwheeler

Just run a better oil that is built with correct materials. Why play the guessing game?

DT40 FTW.

Cw

Wayne Smith

Or DI40 if 997.2. Then again, Mobil One 0-40 has worked fine for me for the last 100K miles under my stewardship. But I don't want to make this am oil war.

Unfortunately I'm not seeing a reference to the analysis data so I'm a bit blind here. But it seems something more is going on. What kind of driving have you been doing? Track? Short trips? Climate considerations. Age? And so forth.

Again, I'm blind here. Sorry if you posted information I'm not seeing. The Android interface is lacking.

KLS

The car has a pretty sedentary life. No short trips, No tracking. Red line it occasionally after it's up to temperature, but thats about as tough as I am on it. It's a PDK and I drive it in sport mode 95% of the time.

Wayne Smith

I've got no way to see your test on my phone. I was able to get it to screen but it is a blur. And when I switch to web view I have no attachments. I'll need to try it on my portable tomorrow. Perhaps someone else can chime in between now and then.

PS: I also have a problem that the posts get cut off on my phone and the names get interchanged so generally I'm not sure who is saying what!!! So sorry if I've add any additional confusion.

AMF997S

Apparently Mobil must make some oil formulations that are not sold in quart containers. I also drive a SL500 Benz that was serviced exclusively at MB dealer from new with Mobil 1 5-40 from a bulk container, so I suspect not all Mobil 1 5-40 is the diesel formulation we see at Walmart.

IrishLegend

102,000

Petza914

Not sure what oil this is or how long it was run, but the Zinc, Phosphorous, and Moly are all a little lower than ideal, which is probably why the Iron & Copper (Bearings) and Aluminum (bores) are 2-3 points higher than what I normally see on my wife's car at 107k miles. Now if the oil was run 7,500-8,500 miles or so, then these numbers are inline. If it was 3,000-5,000 there are better choices out there. That being said, this is also the first report and you can't really see trends until you have a a few (3-4) using the same oil and change interval to really see how it's performing.

IrishLegend

Thanks. I just bought the car in July...records show an oil change about a year ago...I'll check the mileage when I get home (not over 4k, I believe)...it was Mobil 1 I'm almost positive. I changed the oil to Motul about 2100 miles ago.

Petza914

Good move. Change it again and submit another sample between 4,000-5,000 miles and let's take another look.

Sporty

Speaking of Motul 8100 5-40 xcess, I think I am going to change due to my slightly high iron and copper levels and non existent Molybdenum. Runs perfect and does not burn (hardly) any oil in 4200 miles intervals. Oh I did add Defender fuel injector cleaner/booster in the last tank of gas before the oil change. See attached -any input / thoughts? Thanks.

06bom6

Heres my second report. 3440 miles on the oil. Changed from motul that the prior owner put in and changed it for Rotella T6. I know there’s a love hate relationship with T6 around here but it seems to still be doing well for my 90k mile .1c2s. Looking forward to the second report using this oil later this year.

Eric Buckley

Is it not possible that the low viscosity on the 2 DFI engines below is due to fuel dilution more so than shearing? I know the Blackstone report says no fuel dilution but it seems to be fairly well known that their fuel dilution "measurement" is pretty meaningless and inaccurate. The Blackstone estimation of fuel dilution is based on the Flash Point only, and a pretty arbitrary method of determining how much it has changed. Blackstone is not an accredited lab, following industry standards like the companies that serve heavy industry. These other companies actually measure fuel dilution more directly via Gas Chromatography, using an ASTM standard method. I have recently personally confirmed that the Blackstone fuel dilution "measurement" can't be relied on. A couple of oil changes ago I collected 4 samples and sent them to 4 different labs. I knew I had fuel dilution, and Polaris/Horizon/Oil Analyzers/Amsoil has consistently said that I had something over 2% fuel dilution after 5,000 to 6,000km between changes. Blackstone said I had none, though they measured the same low viscosity as all the other labs, and commented on it, but still claimed I did not have fuel dilution when I most definitely did. So, it is possible that the sample submitted by KLS has unreported fuel dilution. The other big lab, besides Polaris, is ALS. Both have multiple locations in North America. There is also WearCheck which has an International presence. You can access Polaris via Amsoil or Cummins or several others who resell their services. I am currently using the WearCheck location in Burlington, Ontario, Canada and have compared them on multiple changes with Polaris and they give the same numbers across the board including fuel dilution. I like WearCheck because I can drop off my sample on the way to work and get my results by the next day at the latest.

Petza914

Keep an eye on Iron and Copper in the next one. When I switched to Rotella T6 in my GMC pickup, I've noticed iron wear increases in the last 2 oil changes, as yours also shows. If the next one shows the same trend, I'll be going back to DT40 in that too. Was trying to save a few bucks on the truck that has 200k miles on it, but won't at the expense of engine wear.

Petza914

What are you going to switch to? The Iron number is trending up a bit for so few miles on the oil.