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  #61  
Old 08-10-2011, 11:57 PM
sjh sjh is offline
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Quote:
Originally Posted by sixto View Post
If the OP subject line was a question, we know the answer.

Sixto
87 300D
they call me mellow Delo...
Silly me.

But I have gained a number of perspectives that I appreciate.

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  #62  
Old 08-11-2011, 12:14 AM
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Originally Posted by sjh View Post
I have not heard the suggestion to change the filter at 50% of the oil life.

Are there any comments?
I have no evdience either way.

But my opinion is that as a Filter gets used and gathers particles it actually filters better than when it is new; also gets more restricted as it is used.

So I do not see the reasoning in changing the Filter 1/2 way before you do an Oil Change.

The reason I say that is because it is not normal even if you drive 6k miles for an Oil Filter to get restricted to the point where it has a negative effect on the Oil Pressure or flow.
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84 300D, 82 Volvo 244Gl Diesel
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  #63  
Old 08-11-2011, 12:49 AM
sjh sjh is offline
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I thought one of the reasons was that it extended the oil change period.

I've never done it, never even thought about it.

But I hear so many different perspectives and am interested in learning from someone who knows instead of has an idea.

So I ask.

Thanks for your reply.
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  #64  
Old 08-11-2011, 08:02 AM
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I blindly change my oil ever 5,000 miles. I should pay the $20 and have some analysed, I would venture I could push it to 7,500 without issue. That $20 would pay for itself quick.

-J
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1991 350SDL. 230,000 miles (new motor @ 150,000). Blown head gasket

Tesla Model 3. 205,000 miles. Been to 48 states!
Past: A fleet of VW TDIs.... including a V10,a Dieselgate Passat, and 2 ECOdiesels.
2014 Cadillac ELR
2013 Fiat 500E.
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  #65  
Old 08-11-2011, 08:35 AM
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Originally Posted by sjh View Post
Thanks.

5K between changes?

7.5K?
This is really soot loading dependent, and so based upon your driving profile and how your engine loads with soot. Id want to pull a UOA at 5k, see how it performs, and if you are below 1% soot, keep going.

7500 miles is likely quite doable,, but I always like ot have evidence.
__________________
Current Diesels:
1981 240D (73K)
1982 300CD (169k)
1985 190D (169k)
1991 350SD (113k)
1991 350SD (206k)
1991 300D (228k)
1993 300SD (291k)
1993 300D 2.5T (338k)
1996 Dodge Ram CTD (442k)
1996 Dodge Ram CTD (265k)

Past Diesels:
1983 300D (228K)
1985 300D (233K)
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  #66  
Old 08-11-2011, 08:47 AM
sjh sjh is offline
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Originally Posted by JHZR2 View Post
This is really soot loading dependent, and so based upon your driving profile and how your engine loads with soot. Id want to pull a UOA at 5k, see how it performs, and if you are below 1% soot, keep going.

7500 miles is likely quite doable,, but I always like ot have evidence.
Thanks. I guess I will this time. Any labs you'd recommend?

If I recall from an earlier post you had some questions on the Rotella formulation. I don't recall if it was it's additive package or what.

Rotella OK or is there something else in that price range that you'd prefer?

Don't worry if others spew over what you say, I'm clearly (and comfortably) asking your counsel.

Thanks.
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  #67  
Old 08-11-2011, 10:14 AM
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I've had OA show safe soot levels to 10k, but I do use an amsoil bypass filter.
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  #68  
Old 08-11-2011, 10:24 AM
sjh sjh is offline
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Well I'm using a Mann filter and just put in 5W-40 Rotella T6.

I'll try to get my OA at 5K and see what's the status.
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  #69  
Old 08-11-2011, 10:27 AM
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Be sure to share your oil analysis results with the rest of the class!
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1991 350SDL. 230,000 miles (new motor @ 150,000). Blown head gasket

Tesla Model 3. 205,000 miles. Been to 48 states!
Past: A fleet of VW TDIs.... including a V10,a Dieselgate Passat, and 2 ECOdiesels.
2014 Cadillac ELR
2013 Fiat 500E.
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  #70  
Old 08-11-2011, 10:50 AM
sjh sjh is offline
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Originally Posted by compu_85 View Post
Be sure to share your oil analysis results with the rest of the class!
Will do.

.
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  #71  
Old 08-11-2011, 11:19 AM
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Originally Posted by ForcedInduction View Post
I've had OA show safe soot levels to 10k, but I do use an amsoil bypass filter.

Define safe. Modern HDEOs can disperse to 4% at least.

I use 1% as a threshold personally though the oil is suitable in service much further. How about some upas to show loading with time? I'd like to compare with my 617 results to see the efficacy of the bypass.
__________________
Current Diesels:
1981 240D (73K)
1982 300CD (169k)
1985 190D (169k)
1991 350SD (113k)
1991 350SD (206k)
1991 300D (228k)
1993 300SD (291k)
1993 300D 2.5T (338k)
1996 Dodge Ram CTD (442k)
1996 Dodge Ram CTD (265k)

Past Diesels:
1983 300D (228K)
1985 300D (233K)
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  #72  
Old 08-11-2011, 06:23 PM
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Quote:
Originally Posted by JHZR2 View Post
Define safe.
4% is the max, though I'd plan to do an oil change if it got over 1%. Soot is just one factor. With these old engines fuel contamination is most important to watch.
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  #73  
Old 08-11-2011, 07:11 PM
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Originally Posted by sjh View Post
Thanks. I guess I will this time. Any labs you'd recommend?

If I recall from an earlier post you had some questions on the Rotella formulation. I don't recall if it was it's additive package or what.

Rotella OK or is there something else in that price range that you'd prefer?

Don't worry if others spew over what you say, I'm clearly (and comfortably) asking your counsel.

Thanks.
I have historically used wear check, though have used texaco oil analysis services recently. Honestly, the easiest way for you to go is to get a kit from NAPA. If you're a AAA member, you'll likely get a discount and it is a decent price. State in the instructions to the lab that you want TBN and soot.

Rotella was once a very ordinary oil (15w-40 HD diesel oil) because its add pack didnt show anything special. Keep in mind though that this was a time when ILSAC GF-4 was coming about, ZDDP levels in standard oils started getting dropped, and API SM was getting phased in. We were seeing all kinds of Moly, Boron, and other good adds showing up in run of the mill oils, and nothing here. HDEOs were still running grp I basestock for not only additive solubility but solubilizing dirt. The advances hadn't come. Enter chevron, pitching delo with hydroprocessed grp II stocks and a great package that flowed better and by all looks was superior. Then it got friction modified with Mo, a dream!

At the time, 5w-40 was a relatively unknown oil viscosity (remember, euro cars were running 15w-40 and 20w-50 oils until the flex service systems hit, good alternate 40wt oils were just in infancy). Delvac 1, 5w-40 was known in the diesel community, but was rarer than hen's teeth. I used to haveto stock up on tripsto Canada.

Two other things were happening... Marshall booth (rip) was finding that syn (M1) was reducing timing chain stretch rates by half, and shell was pushing rotella products heavy at wal mart ( their rotella dfa is still the best fuel add I've used). Rotella 5w-40 hits the scene and availabity of syn HDEOs opens up. NO longer must folks wanting syn be stuck with obsolete (for diesel) add packs in Mobil 1 passenger car oils. Mobil 1 brings out M1 turbo diesel truck, which initially looked to be delvac 1 which was the standard. However due to Katrina, Chinese pressures, wal-mart pricing pressure, etc., m1 formulations get cheapened. GC analysis seems to indicate group III presence in M1 formulations. TDT starts to look different spec wise from D1.

Meanwhile remember that rotella is on the scene at a better price point and with a high VI XVHI basestock which is used in other great oils like the Ferrari spec helix ultra. Fast forward, shell reformulates. We still have the same, potentially not D1 M1 TDT, the same old delvac 1300, and new high performance rotella conventional, blend and syn oils. Good reports start coming in. People are happy.

The reality is that all the oils, syn and conventional are quite good, and you'll have great success with any. Syn vs conventional is mainly for peace of mind because unless you need the crankin benefit, both are very robust.

At this point, group III lubes have more than proven themselves, and the additive pack has become such an integral part of the oil's performance that it sort of puts basestock on the back burner a bit. Basestock is more of a questionable "value proposition" aspect anymore given the performance of quality grp III lubes formulated well to the latest specs. Meanwhile, grp III feedstock can be had and processed at a better price point, while full pao lubes are prohibitively expensive.

In general, the best lube is the one that provides the best protection at minimum viscosity for your application. Enough data is usually impossible to get for non-fleet applications, so it is a tough call to make. What we see as an overall trend is that the higher end major manufacturer lubes all perform about the same, and it is more metallurgy dependent than anything it seems. We've seen good luck with all, some questionable rests with some high end stuff like redline and M1, but it is too spotty to verify a trend or cause.

Rotella 5w-40 is good stuff, and I'd use it or M1 with confidence. Much of peoples' favor is geography dependent. Chevron is popular out west while rotella is popular back east. Texaco is king in the Caribbean, though it has no appreciable market presence in the diesel market in much of NA. It is a funny thing.

My disclosure: historically have run delvac / turbodiesel truck. Have had great success with rotella syn in my BMW. Have been running schaeffer's 5w-40 in both 123s, but rarity/shipping is causing me to only run it in my 240d. My 300cd is getting taken over to rotella.

I look forward to your results. Let me know if you have any questions!
__________________
Current Diesels:
1981 240D (73K)
1982 300CD (169k)
1985 190D (169k)
1991 350SD (113k)
1991 350SD (206k)
1991 300D (228k)
1993 300SD (291k)
1993 300D 2.5T (338k)
1996 Dodge Ram CTD (442k)
1996 Dodge Ram CTD (265k)

Past Diesels:
1983 300D (228K)
1985 300D (233K)

Last edited by JHZR2; 08-11-2011 at 07:23 PM.
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  #74  
Old 08-11-2011, 07:19 PM
sjh sjh is offline
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Originally Posted by JHZR2 View Post
... the easiest way for you to go is to get a kit from NAPA. If you're a AAA member, you'll likely get a discount and it is a decent price. State in the instructions to the lab that you want TBN and soot.

Rotella was once a very ordinary ...

I look forward to your results. Let me know if you have any questions!
Thanks Jahzer II.

I appreciate the details and giving me an easy way to get an oil analysis.

Take care.

sjh

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