Mobil 1 5w30, 15,270 miles, 02 Sequoia

[theophile]

Oil Mobil 1 5w30
OCI 15,270
Total miles 108,330
Sample Date 3/5/11

Aluminum 4
Chromium 0
Iron 19
Copper 4
Lead 0
Tin 0
Nickel 1
Manganese 0
Silver 0
Titanium 0
Potassium 4
Boron 62
Silicon 59
Sodium 13
Calcium 2537
Magnesium 12
Phosphorus 752
Zinc 890
Barium 0

SUS @ 212 63.8
cst @ 100c 11.3
Flashpoint 425
Fuel Insolubles .3
TBN 2.2

First run ever on Mobil 1. Mostly Motorcraft semi-syn 5w30 since new. 80/20 town/highway. Would like to go further. Napa Gold 1516. Last 6 samples silicon runs over 30 using Denso and now Napa Gold air filters.

 

[HTSS_TR]

Everything looks good except Silicon at 59 ppm, you may have a leak somewhere in the air intake. I would not go further than 15k miles with TBN of 2.2.

 

[FZ1]

Oem AF.

 

[tinmanSC]

Blackstone uses a different TBN test than some other places. 2.2 is still ok. I think they say 1.0 is time for a change. I guess you could get the TAN if you're really curious?

 

[JOD]

Originally Posted By: FZ1
Oem AF.


I highly doubt there's a tangible difference between an OEM air filter and the Napa Gold. They're both going to filter quite well. I have to wonder though if the air filter is getting changed too often? I'm thinking that a better idea would be to install a restriction gauge and only change it when necessary.

Besides that though, the oil looked like it help up really, really well. Pretty mucht no shearing, high FP. Without having TAN in addition to TBN, I don't know if I'd go any longer with those driving conditions. I'd say the OP got his money's worth out of this oil.

 

[FZ1]

Well,Hoss,the filters he's runnin' ain't workin',are they?

 

[JOD]

Originally Posted By: FZ1
Well,Hoss,the filters he's runnin' ain't workin',are they?


Umm...there's pretty much zero evidence that's the case...

the UOA has slightly elevated silicone. How you can automatically assume that the quality of the filter is to blame is beyond me.

 

[theophile]

The following are silicon values from previous samples starting @19k: 15, 23, 24, 43, 35, 49, and 36. I used oem's at first on 15k intervals. The last two filters ran 30k before replacing. I did have the timing belt and water pump done during this OCI.

 

[webfors]

Go back to 15k intervals with the filters and enjoy! IMO 30k is too long.

 

[CourierDriver]

Regardless of the silicon which will not blow ur engine to bits, u have a o2 ride that is in good shape. Ur pistons, rings, bearings,crank,flywheel,transmission,cam, seals are still in great shape, and all is well. It nice to hear a successful story on an older auto. It appears u take good care of ur rides.

 

[btanchors]

FYI -

I have performed many UOAs with Mobil 1 5w30EP on my 2006 Tundra, which I believe has the same 4.7L V8 engine. I have noticed a similar pattern with the Silicon levels. At UOA intervals of 5,000 miles, Silicon levels are fine; at 10,000 miles, they are somewhat elevated, although not as high as the ones above. Wear metals have been consistently excellent throughout.

I believe Toyota uses Silcone sealers on this engine. My theory is that continued exposure to the Silicone sealers is additive; that is, the longer the oil stays in the engine, the higher the Silicon levels grow from continued exposure to the Silicone sealants. At lower UOA intervals of say 5K, the elevation of Silicon is not that significant, but it does continue to grow over time. I never ran any of my UOAs beyond 10K miles, but I suspect we're seeing the same pattern here. I don't think the air filter is the culprit here.

 

[hate2work]

Nice report over all, especially considering this was just the standard M1, not EP.

Getting a TAN reading to measure against your TBN would tell you more about if you're going too far on the oil.

Silicon is elevated, could be from what Toy uses, could also be from a poor fitting air filter( possible warped housing ) or a leak in the air intake. I doubt it's from the AF itself, both OEM and NAPA Gold are good filters.

 

[chubbs1]

Btanchors has a point. I would add that if it were the filter, you would see higher wear #'s as a possibility also. No worries, great UOA.

 

[addyguy]

Very, very nice report, but i've got a thought.....

You haven't listed moly in your report - is your '59 silicon' actually your moly value?

Reason I ask is you insols. are basically too low for Si to be that high, and if your silicon was that high, I'd expect more abrasive wear. It's just not there.

Betyond that, everything looks fine - i'd push the next fill to 17-18k and see how it looks. Even at 15k, you MORE than got your money's worth!

 

[cchase]

If that is Si, I'd be at least checking the intake plumbing. The filter might be doing a good job but if air is getting in somewhere downstream of it, you'll still suck dirt in.

 

[SLCraig]

Originally Posted By: cchase
If that is Si, I'd be at least checking the intake plumbing. The filter might be doing a good job but if air is getting in somewhere downstream of it, you'll still suck dirt in.


True, always worth having a look just incase.

 

[buster]

Was there a # for moly?

 

[dparm]

Wow, 15k. Might have been able to run it out another 1 or 2k. But I guess this is just proof that highway miles don't really stress lubricants.

 

[theophile]

Sorry, forgot the moly, 115, normally in the 30's and 40's with the Motorcraft. And this is mostly town, not highway driving. Will Blackstone test for TAN? If not, who? FWIW, I cut the filter open and did not find any sludge on any components. In fact, I detected very, very little grit on the media. I think I will try 18k on this current fill. Thanks for the comments.

 

[goodtimes]

The air filter on this 59 ppm Si run was a Napa, or Denso? I read it was a Napa. What is the relation between silicone sealers and silicon readings? Didn't think there was any since they are two different things.