Did my first 10k mile OCI

[KrisZ]

I decided to take advantage of my longer commute and the mild weather California enjoys, to extend the OCI on my 06 Mazda 3. The car currently has about 167k miles and spent most of its life on 5k mile OCIs using conventional oil.
I'm happy to report that the oil level stayed at the max mark on the dipstick and no makeup oil was added. The oil of choice was Mobil 1 5w30 and it was replaced with Mobil 1 0W40 just for the heck of it, since I never used a 40 weight in this car before.

The oil was a bit darker on the dipstick than on my normal 5k OCIs, but it was still transparent as can be seen in the picture.

 

[ARB1977]

Probably did some clean up. I probably wouldn't of extended that oci to 10K without doing a shorter interval or two first.

 

[Kode]

It was darker either because of cleaning what was already inside or burning itself up.. With that said, it looks like changing it was a good thing.

 

[UncleDave]

I've seen way worse looking oil at 10K.

You can see through it just about everywhere on the stick-

When it stops transmitting light completely it usually blots out dark on a card.

UD

 

[JeffKeryk]

Originally Posted by UncleDave
I've seen way worse looking oil at 10K.

You can see through it just about everywhere on the stick-

When it stops transmitting light completely it usually blots out dark on a card.

UD

Heck, this ain't bad at all. I have seen far worse at half the mileage.

 

[ka9mnx]

For Mobil 1 it looks about right. Probably looked like that at 5k. Looks fine by me.

 

[SwampSurvivor]

My 2011 Focus with the Mazda i4 seemed to do great with 10K mile oil changes

 

[92saturnsl2]

I've been doing longer drains (around 10k) for awhile now and the color winds up being close to what you have pictured.. 15-20 years ago, my oil looked like that after 3k. Shows how much oil and engines have improved in that time.

 

[BigShug681]

Oil color doesn't mean a lot in terms of serviceability. Diesel oil turns pitch black in about 3k miles and is still healthy

 

[KrisZ]

I also don't think color is an indication of oil degradation to a point of course. If it turns pitch black in a gasoline engine, I would take note. Diesels are a totally different animal. I figured if tig1 can do 10k OCIs with pretty much everything he drives and in winter too, I don't have anything to worry about in a much milder climate.

My only concern was oil consumption as the PCV is original and the rings might be a bit stuck, but looks like everything works as it should.

 

[Zee09]

Originally Posted by JeffKeryk

Originally Posted by UncleDave
I've seen way worse looking oil at 10K.

You can see through it just about everywhere on the stick-

When it stops transmitting light completely it usually blots out dark on a card.

UD

Heck, this ain't bad at all. I have seen far worse at half the mileage.


Agreed. No big deal here.

 

[bbhero]

Originally Posted by KrisZ
I also don't think color is an indication of oil degradation to a point of course. If it turns pitch black in a gasoline engine, I would take note. Diesels are a totally different animal. I figured if tig1 can do 10k OCIs with pretty much everything he drives and in winter too, I don't have anything to worry about in a much milder climate.

My only concern was oil consumption as the PCV is original and the rings might be a bit stuck, but looks like everything works as it should.



I think what you have stated here makes sense to me.

 

[Revving2Redline]

Can M1 even make it 10k? I know EP could or should.

 

[blupupher]

I had done a few 10,000 mile runs on my '04 Elantra when I was doing all highway.

I used a variaty of synthetic xw-30 oils and a few UOA always looked good. If I ever have another vehicle that I do mostly highway driving with (that is not a DI Turbo) I have no issues doing it again.

 

[miden851]

just another great MZR engine!

 

[JLTD]

Welcome to the 10k club!

 

[Triple_Se7en]

How low was the oil level on the dipstick at 10K? Adding no oil during your 10k OCI does not mean the vehicle didn't use any oil.

 

[UncleDave]

Originally Posted by BigShug681
Oil color doesn't mean a lot in terms of serviceability.



Jim Fitch at (and who is) Noria Corp. disagrees.

You can learn a ton by observation and periodic oil inspection of a gasoline engines sump.


UD

 

[4wd]

An example would be an engine that normally has brown oil … still can see the dipstick hashmarks for up to 48k of 5k OCI's … and now I pull a dark black corn dog on the dipstick at only 3k … That oil wreaking of gasoline for the first time ever . (So much for fuel diluted oil always being thinner … not when severe oxidation turns the corner)

When the dealer found nothing wrong we just changed to another oil … ran a double dose of Techron through the system … and have not seen that again …

 

[DoubleWasp]

Originally Posted by Marco620
Can M1 even make it 10k? I know EP could or should.


Done 10k OCIs on Super 5000 with very favorable results.