1UZ-FE 98 GS400 11040 miles Castrol Edge w/titaniu

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This is the older Castrol w/titanium. This is the oil that went in the car in January 2014 after the 30100 mile run (Dec 2012 to Jan 2014) with Amsoil ASM and Amsoil EAO15 filter (the big filter like a PF8A/FL1A), OEM filter I felt was way too small for this long of a drain.

98 Lexus GS400, 216925 miles at time of Castrol came out. Using Amsoil air filter (application is for V8 BMW 5 series), was a near drop in filter.

I included the first UOA (also in another thread) and the new one that was completed today.

Code:
Amsoil ASM, 30100 miles Castrol Edge w/Titanium 11040 miles

Sample # 1 2

Iron 38 14

Chromium 0 0

Nickel 1 0

Aluminum 5 3

Copper 6 2

Lead 12 5

Tin 0 0

Cadmium 0 0

Silver 0 0

Vanadium 0 0

Silicon 29 14

Sodium 92 28

Potassium 2 1

Titanium 3 28

Molybdenum 108 84

Antimony 0 0

Manganese 0 0

Lithium 0 0

Boron 31 24

Magnesium 25 768

Calcium 2938 1480

Barium 0 0

Phosphorous 554 627

Zinc 654 759



Top off oil 0.5 qt 0 qt

Fuel Dilution < 1% < 1%

Soot < 0.1 % < 0.1 %

Water < 0.1 % - PTIR < 0.1 % - PTIR

Viscosity @ 100C 11.3 9.4

TBN 1.62 3.47

Oxidation 66 25

Nitration 32 18



Comments on Sample 1

Base Number is SEVERELY LOW. Viscosity is SIGNIFICANTLY HIGH; Infrared results indicate beginning lube oxidation; Infrared

results indicate that NITRATION is at a MINOR LEVEL; Sodium is at a MINOR LEVEL; Sodium sources: coolant (antifreeze), lube

additive or supplement, and/or environmental contaminant; Abrasives (silicon/dirt) are at a MINOR LEVEL; Boron is slightly low

for this lubricant. Lubricant and filter change acknowledged;





Comments on Sample 2

Flagged data does not indicate an immediate need for maintenance action. Continue to observe the trend and monitor

equipment and fluid conditions. Base Number is MODERATELY LOW. Flagged additive levels are different than what should be

present for the lubricant that is identified for this unit. (This does not imply that the lubricant does not meet proper API, SAE, or

ISO classifications.); Lubricant and filter change acknowledged;
 
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5W20, sorry, didn't realize that wasn't in the list. The Amsoil ASM is 0W20 in the 30k mile run.

Not sure what FST is, this is the older Castol that was discontinued a couple years ago.
 
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Man you put a lot of miles on your cars.

I do not think I would ever do a 31k OCI. Personally I would change it every 6 months or so and do a 15k interval at most. Just my
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I'd prefer the 10,000 miles on an over the counter synthetic like this Castrol, Mobil 1, Pennzoil Ultra, but that is personal opinion.

Thanks for sharing these UOAs! Very interesting.

What oil did you put in now?
 
Adding next sample of Amsoil ASM, 25050 miles on sample. This one I changed filter to a PureOne at 18000 to see what it would do. Nothing showing on Particle Counts, unknown if measured.
Seeing where TBN is showing, 25k is definitely the End of Life for the oil. I've added a much larger oil filter now, EAO26, so this oil change topped off (slightly high) was 7 quarts of oil 0W20 ASM again.

This seems to me even at 241k miles, this is a very solid 1UZ-FE VVTi engine.

Still trying to figure out how to install the bypass oil filter on this engine, space is an issue.

Code:


Code:

Oil Amsoil ASM Castrol Edge w/Titanium Amsoil ASM

Miles on Sample 30100 11040 25050

Miles on car 186825 216925 241950

Weight of Oil 0W20 5W20 0W20

Sample 1 2 3

Iron 38 14 20

Chromium 0 0 0

Nickel 1 0 0

Aluminum 5 3 5

Copper 6 2 7

Lead 12 5 8

Tin 0 0 0

Cadmium 0 0 0

Silver 0 0 0

Vanadium 0 0 0

Silicon 29 14 18

Sodium 92 28 22

Potassium 2 1 4

Titanium 3 28 5

Molybdenum 108 84 122

Antimony 0 0 0

Manganese 0 0 0

Lithium 0 0 0

Boron 31 24 25

Magnesium 25 768 163

Calcium 2938 1480 2903

Barium 0 0 0

Phosphorous 554 627 690

Zinc 654 759 766



Top off oil 0.5 qt 0W20 0 qt 1 qt 10W30 Amsoil Small Engine

Fuel Dilution < 1% < 1% < 1%

Soot < 0.1 % < 0.1 % < 0.1 %

Water < 0.1 % - PTIR < 0.1 % - PTIR < 0.1 % - PTIR

Viscosity @100C 11.3 9.4 8.2

TBN 1.62 3.47 2.19

Oxidation 66 25 57

Nitration 32 18 20



Comments on Sample 1

Base Number is SEVERELY LOW. Viscosity is SIGNIFICANTLY HIGH; Infrared results indicate beginning lube oxidation; Infrared

results indicate that NITRATION is at a MINOR LEVEL; Sodium is at a MINOR LEVEL; Sodium sources: coolant (antifreeze), lube

additive or supplement, and/or environmental contaminant; Abrasives (silicon/dirt) are at a MINOR LEVEL; Boron is slightly low

for this lubricant. Lubricant and filter change acknowledged;





Comments on Sample 2

Flagged data does not indicate an immediate need for maintenance action. Continue to observe the trend and monitor

equipment and fluid conditions. Base Number is MODERATELY LOW. Flagged additive levels are different than what should be

present for the lubricant that is identified for this unit. (This does not imply that the lubricant does not meet proper API, SAE, or

ISO classifications.); Lubricant and filter change acknowledged;





Comments on Sample 3

Base Number is SIGNIFICANTLY LOW. Flagged additive levels are different than what should be present for the lubricant that is

identified for this unit. (This does not imply that the lubricant does not meet proper API, SAE, or ISO classifications.).

Lubricant and filter change acknowledged.



Oil filter changed from Amsoil Eao15 to PureOne PL30001 at 18000 miles, added 1qt Amsoil 10W30 small engine oil to top off
 
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Late to the party here, but have to ask -- why are you running 0w-20?

Do you realize that you could cut iron and lead in half with a thick(er) 5w-30?
 
Originally Posted By: Ramblejam
Late to the party here, but have to ask -- why are you running 0w-20?

Do you realize that you could cut iron and lead in half with a thick(er) 5w-30?


Very much doubt iron could go down further. Just about every UOA I've ever seen has iron above about 1 ppm per 1,000 miles, even on Toyota/Honda engines, its extremely rare to get better.
Kind of makes sense to go with 0w-20 like this, since it drifts upwards into viscosity 30 territory after a while on long oil change intervals.

On long interval oil changes, go through a couple of MicroGreen or Fram Ultra oil filters to get the smallest stuff out, they are the best for that.
 
Great #'s for a long run like that. I'm guessing you drive it easy. Keep doing what you're doing.
 
Drive easy? Not if WOT passing on back roads is easy... It gets run well, not abusive by any means, but not babied at all. It sees >5000 rpm at least a couple times a day.... It redlines at 6400 rpm, and is not slouch up there.

I get around 22-24 city/highway and 27-28 highway at 75 mph, but rarely ever get pure highway, always back roads, go for a few miles at 55-65, and then city driving (stop and go) and then back up to speed to the next town.

I am considering adding an oil cooler to see if the oxidation is less at the high end of the 25k mile oil change. I have added a Eao26 filter, the big one used on the Amsoil bypass dual remote setup, it fits perfect. I am up to 7 quarts in the whole system now (just a tad overfull, but ok)

The bearing clearances on this engine are very very tight, so that is why I went 0W20, not seeing evidence it is an issue. The newer engines (1UR-FSE) is looser tolerance and calls for 0W20, mine is significantly tighter and called for 5W30. xw20 didn't exist in 1998.

Will see just how many miles I can get on this engine, but it runs so well, at 242k now, I can't imagine it causing me wear issues even at 400k the way I am going. I just want to see the oxidation lower at 25k. An oil cooler should help that, as well as add a tad capacity. I can't figure out where to mount the bypass oil filter, its a tight engine compartment.
 
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