Depends on what you're looking for. If the idea is just to figure out a safe OCI you make a couple tests, like 5,000, 7,500, 10,000. If 10,000 looks good its probably fine to repeat. If 10,000 looks marginal you could make another run at it (I had to do that with my '85 190D, the previous owner must have used crappy oil and the M1 cleaned the engine over time) or go back to your last good test interval and call that good enough.
For instance with my '85 190D I once took it all the way to 15,000 and the oil still tested fine. I dropped back to 10,000 mile OCI (twice a year at the time) and called that good enough since it meant I could change the oil in the fall and not worry about it all winter plus I knew I had a good safety margin. If the idea is to really watch for changes in the engine then ongoing samples are called for but it sounds like thats something you're not interested in. Curt ________________________________ From: Dan Penoff via Mercedes <firstname.lastname@example.org> To: Mercedes List <email@example.com> Sent: Wednesday, July 16, 2014 6:44 PM Subject: Re: [MBZ] Mobil 1 $23 at Wally World Not sure I understand. Every industrial engine sampling program I ever ran was sampled on a regular schedule. I understand the baseline concept, but in the programs I worked with we would sample several times a year to determine the oil condition to determine when it was exhausted and should be changed. Dan Sent from my iPad > On Jul 16, 2014, at 6:34 PM, Curt Raymond <curtlud...@yahoo.com> wrote: > > You know you don't continue with the samples right? You get a good baseline > and then continue with your OCI... > Plus this gives you a baseline so you know whats inside your engine... > > -Curt > > From: Dan Penoff <d...@penoff.com> > To: Curt Raymond <curtlud...@yahoo.com> > Sent: Wednesday, July 16, 2014 6:18 PM > Subject: Re: [MBZ] Mobil 1 $23 at Wally World > > I just did the math on this and it doesn't make sense. Here's what I'm > thinking: > > 7.5 quarts of oil = $34.50 > Oil filter = $10.00 > > Oil change total = $44.50 > > Twice a year = $89.00 > > Oil change = $44.50 > Oil samples = $60.00 > > Once a year oil change + samples = $104.50 > > > I could dink around with the frequencies of samplings and changes, but let's > say you do it over a year as shown above. You're spending more than two oil > changes. Push it out to 18 months and the difference is marginal at best. > > The numbers just don't add up or make sense to me. > > Dan > > Sent from my iPad > > > >> On Jul 16, 2014, at 5:55 PM, Curt Raymond <curtlud...@yahoo.com> wrote: >> > >> One last thing and I'll shut up, the analysis is so easy the "hassle and >> expense" is laughable. Remember you do it 3-5 times which shows you the >> duration that the oil is viable. >> You contact Larry and give him $60, he sends you 3 bellows bottles. You put >> the tube down the dipstick hole, crush all the air out of the bottle and >> then suck up a sample. Put on the cap, put it in a baggie, fill out the >> paperwork, put the bottle/baggie in the prepaid mailer and then drop it in >> the mail. Later he emails you results and sends a paper copy in the mail. >> Couldn't possibly be easier unless somebody did it for you. >> >> I wish I could find the post on TDIclub where they talked about the oil >> being more abrasive than it ought to at first but I can't. When I find it >> again I'll let you know. Interestingly if you try googling around theres >> quite the rift. Many of the car sites like Edmunds are pushing people away >> from the 3,000 mile oil change but theres several shop pages pushing people >> back to it. The later are suggesting that cars are sludging up and failing >> because of infrequent oil changes. What they aren't saying is that extended >> OCI on conventional oils or cars that require synthetic is probably they >> cause... >> >> -Curt > > _______________________________________ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com All posts are the result of individual contributors and as such, those individuals are responsible for the content of the post. The list owner has no control over the content of the messages of each contributor. _______________________________________ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com All posts are the result of individual contributors and as such, those individuals are responsible for the content of the post. The list owner has no control over the content of the messages of each contributor.