New Used Oil Analysis Mobil 0w-40 8000 miles

[cary]

Results of UOA by Blackstone Labs:

Aluminum 2
Chromium 0
Iron 6
Copper 3
Lead 0
Tin 0
Molybdenum 56
Nickel 1
Manganese 0
Silver 0
Titanium 0
Potassium 0
Boron 88
Silicon 9
Sodium 6
Calcium 2787
Magnesium 21
Phosphorus 764
Zinc 908
Barium 0
SUS Viscosity at 210 deg. F 74.1
Flashpoint deg. F 395
Fuel % <0.5
Antifreeze % 0.0
Water % 0.0
Insolubles % .3
TBN 3.6

Miles on oil: 7980
Time on oil: 8 months
Milage at sample: 129,980
Filter: Toyota 20004
Crankcase capacity: 8 qts.
Oil added: 3 quarts
Usage is approximately 30% highway/70% city. This vehicle sees a great deal of short trips, plus extended idling, plus a couple of long trips. I do not baby the engine and use full throttle regularly when accelerating, passing, or climbing hills.

Here is a link to the last UOA with this oil with a 5400 mile interval.

http://theoildrop.server101.com/cgi/ultimatebb.cgi?ubb=get_topic;f=3;t=001262#000000

Blackstone's Comments:

You ran this oil about 2,500 miles more than the last sample, and the only wear increase we found were iron and copper, and they were slight increase. Your wear is still reading at or below the universal averages for this type of engine, which are based on routine oil use of 4,750 miles. This is a very good indication of normally wearing parts and careful operation. No antifreeze, fuel, or watter was found. TBN read 3.6, only slightly less than last time, and showing some additive remaining. With wear this good, we think you could run 9,000 miles for the next sample.


Bottom Line: This engine likes this oil and under normal driving should be able to push it out to 10,000 miles between changes with no trouble. TBN of 3.6 shows a lot of additive remaining, with the minimum that you want to see of 1.

 

[Junk]

Cary, how often do you get these tests done? I've seen you post several now and how much, if you don't mind me asking, do they charge?

 

[concretejungle]

great info cary! Thanks. This is great stuff for all board members.

One question, what does TBN mean?

 

[Beowulf]

>> Oil added: 3 quarts <<

Cary,
How does the 2700 mi/qt compare to your usage with other M1 weights?

-B-

 

[cary]

I've only run two reports on this engine and they were to confirm my thoughts that this combo of oil and 7500 mile change interval would be fine. The reports are $20 for the basic report and $30 with the TBN. I will probably not continue doing regular reports and stick with 7500-10,000 mile oil change intervals.

TBN= Total Base Number and is a measurement of the remaining additive package in an oil. I believe this oil starts about 8 or 9, and you don't want to go below 1. Note that a higher number does not necessarly mean an oil will last longer and TBN does not drop in a linear manner. So what is really important is that you don't go below 1.

As far as consumption, I have not run other grades of M1. I believe the 30 weight Mobil 1 oils are to thin to use (they are borderline 20 weight oils) so I have never used them, and for my climate I have not felt the need to run 15w-50 (I see temps of up to 105F but not that often). Like others I see an increase in consumption on long trips where the truck is run hard.

Cary

 

[lurker]

Thanks Cary, great info for $30.

 

[tucker74]

Great info man - I switched to this weight on my last oil change (from M1 10W30) and am glad to see the excellent results!



Tucker

 

[mabrodis]

Great info...what do those numbers mean? Are they parts-per-million? Percentages? Or are they just 'their' numbers that you compare from a previous run to know if something went up/down but don't have alot of meaning in their own right?

All the stuff in there, it looks like a energy bar label or something..

 

[cary]

They are PPM. You can go to blackstone-labs.com to get info on what each of the numbers actually means. Bobistheoilguy has a ton of UOA's to get an idea of wear numbers on other motor/oil combo's. SHort answer is that they don't start flaggint he wear numbers until the lead/iron are up above 50 or 100.

 

[landtoy80]

Cary,
as you know I had the excessive oil consumption of the M1 0w40 when run at red line.
My oil consumption with RotellaT syn 5w40 is 1qt per 2000mi. The oil goes down at a constant level no mater how I drive it. And ALL the leaks and seeps are gone.

How can I tell if I am using oil at start up (valves) or when driving (rings)?
I had one time where I seen smoke at start up. That was after it sat a full day and the weather was warm that night. The wife doesn't like it when the motor gets cold so I don't know if it would smoke again or not.

Scott,
has you wifes 80 smoked again?


Once again, a 1FZoil-injected (twocycle) is better than a non oil using 1FZ. Its like having a bypass filter where you are always adding fresh oil(and the additives) to the motor when you replace the filter.

Cary,
How do you think a 1FZ with 8000mi and no oil added would test?

 

[archie]

Have you tested other vehicles or oils with and what did you find out? Thanks!

 

[IdahoDoug]

Junkster,

How about combining the oil analyses from this and the other threads so anyone in the future doing an analysis can add to it and we can have some excellent comparative data. Also, I'd like a pie chart, some graphs and a couple nice dissolves a'la Powerpoint......

DougM

 

[Desertmaster]

Thanks Cary for the detailed report.....I have been running 0w-40 M1 since you came to the board and you recommended it, and I have put on the rig over 25K miles since then and it has been running great without any oil consumption whatsoever.......oil change intervals @ 5K religiously.

Thanks again for making this info available to us.

Al

 

[cary]

Cary,
My oil consumption with RotellaT syn 5w40 is 1qt per 2000mi. The oil goes down at a constant level no mater how I drive it. And ALL the leaks and seeps are gone.

How can I tell if I am using oil at start up (valves) or when driving (rings)?

Cary,
How do you think a 1FZ with 8000mi and no oil added would test?

While you might feel it is excessive, 1 quart of oil every 2000 miles is not excessive consumption. I really wouldn't worry about it. The way to tell if you have blowby at the rings or valves is by doing a compression and leakdown test. A mechanic will charge you about $100 or so to do one. Once again, I wouldn't do one because you don't have excessive consumption.

As far as 8000 miles on a 1fz, with no oil added, I am assuming you are saying that it doesn't burn any oil. I believe it would be fine with a slightly lower TBN number because there wouldn't have been additives replaced due to the fresh oil. One of the reasons these engines turn in good numbers is they have a large oil sump. 8 quarts allows for much longer change intervals than 4 or 5 quarts. If you look at the german cars that are recommending 12,000-15,000 mile oil changes (BMW, Mercedes & Porsche) you will see they hold 7-9 quarts of oil, except for the porsche which is 12-15 quarts (dry sump). They can go this long because 1) tight engine tolerances limit blowby, 2) they have large sumps, and 3) they use high quality synthetics.

Cary

 

[cary]

Have you tested other vehicles or oils with and what did you find out? Thanks!

Go to bobistheoilguy.com and you can view in the neighborhood of 500+ used oil anaylsis.


Cary

 

[StressPuppy]

cary,

just wanted to say "Thanks" too. This is great info, and I have a bunch of M1 0w-40 waiting to go in on the next oil change. I have checked my compression and it is strong, but didn't do a leak down test. But I am not burning much if any oil that I am aware of, so I don't foresee any problems with changing.

I have already put M1 in the diffs and t-case. Oil and tranny are next!!!!

 

[reffug]

What is the major difference between M1 0w-40 compared to M1 10w-40 synthetic? I use the later in my rig in VA and have never had any consumption problems and the oil basically looks new when changed, of course I never run more than 5K before changing.

 

[cary]

What is the major difference between M1 0w-40 compared to M1 10w-40 synthetic? I use the later in my rig in VA and have never had any consumption problems and the oil basically looks new when changed, of course I never run more than 5K before changing.

Ugh, for starters Mobil doesn't make a 10w-40 synthetic.

 

[reffug]

Your right, my bad typing to fast and not thinking. 10w-30 synthetic.

 

[cary]

Rather than go into all the details, go and do a search under my name and oil. It should keep you busy with about 2-3 hours and 200+ posts worth of information.

Cary