Amsoil 0w30 results, 2002 Toyota Tundra

[Michigander]

I just recieved my first results after switching to Amsoil 0W30 and I am a bit concerned about the increase in Iron, Lead and Aluminum.

Vehicle is located in Northern Michigan, garaged and driven about 15 miles each way to work on paved rural roads and for occasional trips under 250 miles.

Results below

Comp. Descr.: V8 ENGINE Fuel Type: Gasoline
Oil Brand: First:QS Second:AMSOIL
Oil Type: Firsteluxe Second:S2000 SYN ENG
Equip. Make: 2002 TOYOTA Fluid Grade: First:5W30 Second:0W30

Equip. Model: TUNDRA Sr5 4X4 4.7L


SPECTROCHEMICAL ANALYSIS (ppm)
Miles on Unit
6646 11479
Iron 3 47
Chromium 0 1
Lead 0 11
Copper 13 37
Tin 0 0
Aluminum 0 10
Nickel 0 0
Silver 0 0
Silicon 15 29
Boron 32 3
Sodium 0 2
Magnesium 80 340
Calcium 1244 2792
Barium 0 0
Phosphorus 934 1034
Zinc 1108 1221
Molybdenum 7 4
Titanium 0 0
Vanadium 0 0
Potassium NA 0
Physical Properties

Fuel Visc40 NA NA
Visc100 8.5 10.71
Water 0.05 0
Soot/Solids NA NA
Glycol Neg Neg
Additional Tests
CHANGED YES NO
NITR 10.0 19.0
OXID 5.6 22.0
TAN NA NA
TBN 7.6 5.84

Analysis Recommendations
Second analysis 75317 RESULTS OF TEST PERFORMED INDICATE NO CORRECTIVE ACTION REQUIRED.
First analysis 297214 VISCOSITY IS OUT OF INDICATED GRADE NORMAL WEAR INDICATED RESAMPLE AT NEXT REGULAR INTERVAL


Notes added:

Factory oil changed at about 1500 miles to QS 5W-30 and Fram filter.
QS oil changed at about 5000 miles to Amsoil Series 2000 0W-30 and SDF 15 filter.
First analysis performed by OAI in Superior WI as a baseline
Second analysis performed by new lab in Cleveland OH

[ May 06, 2003, 06:20 AM: Message edited by: Patman ]

 

[Pablo]

Interestingly no mention of Si, which seems quite high for such low mileage. This and the winter cold mayexplain the relatively high wear metals, when the oil itself doesn't look too beat up. (remember OAI and OAI CTC can be 1.5 - 2 lower on TBN)

Of equal interest is the vicosity drop in the Pennz.

 

[Patman]

As Pablo mentioned, cold winter weather is a factor here, a big one I believe. I know Michigan got just as cold a winter as we did, and my oil analysis results showed tons of iron too.

Another thing is that Amsoil is cleaning off old wear metals that were previously caked on to your engine, so it's showing wear that took place a long time ago.

Your results will definitely look better on the next interval with Amsoil. Don't go beyond 6 or 7k on this oil until you're sure the numbers are stabilizing though.

 

[TooSlick]

These wear rates are very high, compared to what I've seen with the Amsoil 0w-30 in other toyota engines. I'd sample the next batch @ 7500 miles and I think you'll see these numbers come down significantly. I also think you have some incapsulated wear metals being cleaned out and held in solution here.

Oil still in decent shape, will very little change in viscosity. You can go down to a TBN of 3-4 with the way CTC calculates this parameter.

TooSlick

 

[Michigander]

If I read the replies right, it seems as if it would be "OK" to do a filter change, top off the oil and go for another 6 months or 7500 miles, or am I reading too much into the replies?

 

[buster]

quote:

---

It is rumored that in Europe they specify a 10W40

---

This is what I was curious about. So in Europe, is this truck designed differently to handle a 40wt. or is it just the CAFE? Nice truck though. I am considering a Tundra or Tacoma as my next vehicle.

 

[buster]

Just keep an eye on the Visc change. This oil has a tendecy to thicken to a 40wt. very quickly. What wt. do they call for in Tundras?

 

[Michigander]

For North America they specify 5W30 as the prefered viscosity and 10W30 acceptable for temperatures above 0 F. It is rumored that in Europe they specify a 10W40. I am not sure if they use the same engine in Europe or not.

 

[TooSlick]

Michigander,

You could probably get another 3000-4000 miles out of this oil if you changed the filter at this point and topped off the crankcase. However, I'd probably do a complete change and start fresh. I believe based on the results I saw in my Toyota Tacoma that the engine is still wearing in at this point. With this Toyo V-8 I would expect the wear rates will take 20,000 miles to stabilize. Wear rates should also come down with the warmer weather. The silicon(e) in this case is from engine gaskets and sealants ...I see this all the time in new Toyota engines.

I would have to respectively disagree with Buster about this oil being prone to thickening. I've run it as long as 16,000 miles in hard driven VW Jetta and it only thickened by about 10%. I'd certainly consider that acceptable ....In this case the viscosity is essentially unchanged, in fact it has thinned out very slightly from the baseline value.

TooSlick

 

[buster]

TS, I have seen this twice my analsyis (although the results were not the greatest due to contamination one time) But the second time I ran this it thcknd to a 40wt. after 3k miles. Terry also has seen this quite often with S2000. I'm not so sure this oil maintains its grade that well.

 

[buster]

The oil is almost a 40 though to begin with so it's not a huge leap in visc. change, but being I drained them so soon had me concerned.

 

[TooSlick]

Buster,

If the Series 2000, 0w-30 is thickening that much that quickly, you are getting abnormal contamination. It will thicken after 15k-20k miles, but not with these shorter drains. As I recall, your 7000 mile sample had a total solids level of 1.5% - that's about 4-5 times as high as it should be in a properly functioning motor. The only other explanation is that you had preexisting deposits that were being loosened up. However, given your previous use of Mobil 1, that is unlikely.

I have lots of experience with the Amsoil 0w-30 in hot climates and it maintains viscosity very well.

TooSlick