Hans Delbruck

Hey now -- someone who's driving a 6.2l V8 shouldn't be too concerned about how the use of his automobile is affecting the environment, right?

I changed at about 1200 miles, 5000 miles and 10,000 miles. I will continue to change oil every 5000 just because it's easy to remember, plus I've never had to add oil this way. My dealer only charges me $102 to boot!

220S

Well, that's better than 3-4k. But to play devil's advocate, driving a 6.2l V8 maybe means we therefore maybe need to be attentive to the environment. You know, our footprint's already big, so let's not get too carried away.

fwiw, here's a good essay by somebody who does know a lot about motors. He's very well respected in the Porsche racing world. Read what he says about OCIs (and what the industry has decided.) http://www.lnengineering.com/oil.html

jstefanop

iTrader: (1)

What I mean is that the very first oil change in any car (what I call the "break in oil") will have a very high amount of wear metal due to the break in process.

That is why many people change their oil right after the break-in (which is usually around 1k) and then change oil at the normal intervals thereafter.

After the break in process (which is mostly complete after 1k miles) there wont be as much wear metal accumulating in the oil.

desmo996

I just bought a new '09 which was probably sitting at the dealer's for a while. Should the oil be changed right away because of the possibility that the car was sitting and unused for months before I bought it? Does the oil get old and go bad like gas does?

Multispeed

Here are the analysis results of my second and third fill of engine oil.

I forgot to get the factory fill analyzed when I had my first change at 3886 km (about 2400 miles)
-Second fill ran from 3886 km to 10,626 km (6740 km or 4188 miles on oil)
-Third fill ran from 10,626 km to 14067 km (3441 km or 2138 miles on oil)
-On my fourth fill right now which I will sample at 3500 km and compare it to the previous samples.

220S

Yeah I understand all that. I guess I just didn't understand the way you said it: "Compare the oil in my pictures to any oil change after the initial break in and you wont find the oil filled with metal particles like that. "

"Any oil change after break in, and you won't find the oil filled with particles like that." (?) Why might not somebody else find particles after their break-in oil change just like your's (?) That's what confused my addled brain..... makes it sound like you got some major metal wear issues or something.....

ps what's the filter oil look like? Curious because you had a lot more particles than I did with my early break-in change.....seems excessive(?) Which is why I thought why not do a UOA?

bhamg

Thanks for posting - it's very useful to have a preliminary baseline. I noticed you changed from 0W-40 to 5W-40 as identified on the 2nd PDF...exactly which Mobil oil is that?

edit: Weird, your PDF's are still showing 0 views, even after I downloaded them and refreshed the page...

RNS-11Z

well i changed my oil at 1000kms then again at 6000kms, and i will change it again at 10000kms then every 5k onwards. better to be safe then sorry

220S

Agree that make up oil makes a difference in OCI. And also filters as Glock says.

And in that Mobil 1 test that was done a while back, they said, "Topping up the crankcase is a critical component of extended oil change intervals, and frequent filter changes are most likely the key to extreme-length intervals. The cumulative effect of even minor top-ups, let alone a filter change, substantially increases the longevity of the oil."

Also: "Engine wear actually decreases as oil ages. This has also been substantiated in testing conducted by Ford Motor Co. and ConocoPhillips, and reported in SAE Technical Paper 2003-01-3119. What this means is that compulsive oil changers are actually causing more engine wear than the people who let their engine's oil get some age on it. 3,000-mile intervals is a huge waste of resources."

In the end, the OCI 'debate' will go on forever in car forums. And everyone will have they own ideologies, etc.. It will forever be part of a car enthusiast's dialogue... until the world runs out of oil.

But the reality is that no one here will ever have an oil related modern engine failure due solely to their OCI method. And most people don't even own their cars long enough anymore, anyway. We'll all die of ****-retentiveness first.

Bottom line: don't worry and maybe watch your tire pressure instead.

gsrjc

do you think that this type of issue is only with the C63 or should people also change their oils whenever they get a new car?

jstefanop

iTrader: (1)

All new car engines go through a break in which usually lasts around 1k miles, and I always do my first change around 1k miles with all my new cars.

Multispeed

The 0w-40 was the Mobil 1 you most commonly find in stores.
The 5w-40 is the ESP Formula M that the dealer uses so thats what they put in. I didnt really care which one was used but next time I will either go back to the 0w-40 Mobil 1 or another higher Zinc Mobil formula or Ams/oil.

MRAMG1

+1

Me too, with EVERY car I have ever owned

peet

If you have prepaid service make sure your dealer does NOT reset the flexible service counter or you will be at 12k for your change. BTW - it's whatever mileage OR 12 months - car will tell you.