M1 and Motul users run their oil longer

Status
Not open for further replies.
Joined
Nov 28, 2007
Messages
1,877
Location
Pacnw
At least based on a small database for one specifc engine ha ha. A fun graph of average OCI intervals for the vw/audi 2.0 FSI. OCIs were averaged by user and then across all users for that particular brand. # of users is shown in parentheses.

The 33 UOA database that this graph came from and other graphs can be seen on this thread: https://bobistheoilguy.com/forums/posts/1401045/

Also it is interesting that users are changing out factory fill prior to VW recommendations.

OCIbyoiltypegraphcopy.jpg
 
Depending on the application, I just run the maximum factory interval because that's all I think the filter can take. However, if I end up going a couple thousand extra miles because of time or money constraints, I don't stress because I know I have a good lube in there.

My intervals on synthetic are 7.5K - 12K.

I work on cars for a living, do you think I want to spend any more time under them than I have to?
 
Originally Posted By: saaber1
At least based on a small database for one specifc engine ha ha. A fun graph of average OCI intervals for the vw/audi 2.0 FSI. OCIs were averaged by user and then across all users for that particular brand. # of users is shown in parentheses.

Based on the sample size for each oil (1-4 users) the statistical margin of error at a 95 percent confidence level are such that the results are statistically insignificant.

Even at a 90% confidence level, a sample size of 4 has margin of error of +/- 41%. A sample size of 1 has a margin of error of +/-82%.
 
Originally Posted By: Mark888

Based on the sample size for each oil (1-4 users) the statistical margin of error at a 95 percent confidence level are such that the results are statistically insignificant.

Even at a 90% confidence level, a sample size of 4 has margin of error of +/- 41%. A sample size of 1 has a margin of error of +/-82%.


As I said in the other post with the data, these graphs are for fun. Judging from that other thread you started regarding iron wear, you like to post a lot and argue a lot. Is that correct? I didn't pay any attention to that thread because it looked to me like "trollism".

Remember rule #6, don't take yourself too seriously. Also don't try to prove anything with this data and definitely don't take it too seriously, the sample size is too small and lots of these are just "single pass" UOAs. It is for fun. Here is another graph of the data that we shouldn't take too seriously but is fun to play with.

20FSIppmironchartmarch1209.jpg
 
Originally Posted By: Saab9-3
I ran Motul xcess 5w40 8100 in my Saab with spectacular results, I will def use it again.

Cool! Just keep in mind in please that in terms of the graph on OCIs, the graph is simply looking at when people changed their oil.

It is not showing how well the oil held up or performed at all. f.e. if the oil was run way too long and performed terribly, on that graph it would show up on the far right hand side as a long OCI.

So if we had tons of data and could graph it this way, I guess you could say the graph could represent "consumer confidence" in how long to run the oil. Or it may represent a "marketing factor", or ???
 
Originally Posted By: vxcalais
Part that puzzles me is the 2 known long drain oils, Redline and Amsoil are used for short perdiods ??!!

Could be reflective of what people knew about the fuel dilution issue? Mine was the redline UOA and I chose to change at 4k due to 90% city use in the winter and I wanted to try a new-to-me valve cleaning technique just for kicks (requires changing oil after cleaning). I was aware of the fuel dilution issue but that is not why I changed at 4k. Note that VW specs for my car would have required me to change at 5k.

Amazingly, out of 28 UOAs of all different lengths, only 11% met Blackstone's SUS visocosity for a 40 weight oil, only 7% for cST 40 weight, and only 11% met the flashpoint criteria! Hello fuel dilution!! (keep in mind though that the GC UOAs started at a lower viscosity so its not fair to hold those to a 40 weight standard, I just chose the 40 weight standard because that is what VW specs for the U.S.) I excluded the factory fill UOAs for this graph.
blackstone.jpg
 
Originally Posted By: saaber1
As I said in the other post with the data, these graphs are for fun. Judging from that other thread you started regarding iron wear, you like to post a lot and argue a lot. Is that correct? I didn't pay any attention to that thread because it looked to me like "trollism".

Remember rule #6, don't take yourself too seriously. Also don't try to prove anything with this data and definitely don't take it too seriously, the sample size is too small and lots of these are just "single pass" UOAs. It is for fun. Here is another graph of the data that we shouldn't take too seriously but is fun to play with.

When I was in college I was required to take a course in statistics, and I was severely traumatized by the amount of work I had to put into getting a decent grade in this incredibly boring subject. Unfortunately, you now bear the brunt of my emotional scars from my school years.

I don't "like" to argue, but I am really having a hard time figuring out what the best oil is (at least for my brand new car) and I am trying to cut through all the [censored] to the truth (or least some approximation of it). The [censored] from the oil companies obviously does not help much.

Maybe I am deluding myself into thinking that I will ever figure out which oil is really the best, but it sure seems like a lot people have some fairly strong opinions about particular motor oils, that they at least believe is based on rational thinking and scientific data. Unfortunately, there is little agreement among these same people. So I ask some tough questions to see if I can figure out which people really have the answers. Don't take it personally.
 
Status
Not open for further replies.
Back
Top Bottom