Amsoil 0w20 -- 12k -- 05 Accord 4cyl

[5421ben]

Hi everyone,

I'm a long time lurker here and I finally decided to get a UOA, here are the results:

Code:


VEHICLE 2005 Honda Accord DX 2.4L

OIL Amsoil 0w20

MILES IN USE 12k

MILES 47k

SAMPLE TAKEN 02/05/2011



ALUMINUM 2

CHROMIUM 0

IRON 6

COPPER 3

LEAD 2

TIN 0

MOLYBDENUM 46

NICKEL 0

MANGANESE 2

SILVER 0

TITANIUM 0

POTASSIUM 0

BORON 130

SILICON 8

SODIUM 10

CALCIUM 3205

MAGNESIUM 13

PHOSPHORUS 684

ZINC 745

BARIUM 0



SUS VIS 210ºF 56.9

cSt @ 100ºF 9.32

FLASHPOINT ºF 320

FUEL % 3.3

WATER/ANTIFREEZE 0

INSOLUBLES 0.3

TBN 3.3

 

[Pablo]

How did you sample? This could be where the fuel came from.

As Blk. Stn. stated, the fuel is the only issue.

 

[5421ben]

The virgin TBN of this oil is supposed to be 12.1. Since it's down to 3.3 after 12k miles, does that mean I have about 4.5k miles of TBN left? I think that would support my planned 15k OCI (AMSOIL's severe service recommendation).

 

[Pablo]

Originally Posted By: 5421ben
The virgin TBN of this oil is supposed to be 12.1. Since it's down to 3.3 after 12k miles, does that mean I have about 4.5k miles of TBN left? I think that would support my planned 15k OCI (AMSOIL's severe service recommendation).


Different scales tell different tales. Virgin TBN their method would be likely less than 12. Plus it's not a linear scale. I would say (less the fuel) 18-20K shouldn't be a big issue. I likely missed it - what was the timespan of this OCI?

 

[5421ben]

Originally Posted By: Pablo
How did you sample?


I sampled from the oil pan. My wife had just driven the car, she may not have been out long enough to cook off the fuel.

 

[5421ben]

Originally Posted By: Pablo
what was the timespan of this OCI?


I changed it in early September, so about 5 months.

Edited because I can't count

 

[Chris Meutsch]

Another outstanding report for the 2.4L. Glad I have one!
And more proof that 20-weight oil really does protect your engine.

 

[Artem]

Interesting report. Thats a whole butt load of fuel though

I don't see how this is "normal"

 

[Pablo]

Originally Posted By: 5421ben
Originally Posted By: Pablo
How did you sample?


I sampled from the oil pan. My wife had just driven the car, she may not have been out long enough to cook off the fuel.


That could be the reason for the fuel and everything else nominal. It's happened to me on both my cars - those times I was just being lazy and drove the cars around back to the oil change pad - dead cold. My fuel was OVER 5% IIRC. Shows you how much fuel some cars dump when they start cold. Just watch it next time.

 

[Steve S]

Impressive as most of the uoas with the amsoil Amsoil 0w-20 have been.

 

[Steve S]

All engines need a rich ruel mix when starting cold.

 

[Artem]

I think all sampling should be done after the engine has been fully warmed up and ran for a good 20 mins on the highway to get everything nice and toasty.

Fuel in the sample just throws off the results, IMO.

 

[buster]

This oil now has Moly and Boron?

Looks good. I have the same year engine. Fuel dilution is apparently an issue with some of them. Mine uses 1qt of oil every 4-5k miles. 140k.

 

[Artem]

Yea i service my neighbors 05 Accord with the 2.4L K series and Blackstone also found a small trace of fuel in the sample (taken VERY hot)

 

[HTSS_TR]

This UOA clearly shows that recommended oil grade is not because of CAFE.

 

[Artem]

Originally Posted By: HTSS_TR
This UOA clearly shows that recommended oil grade is not because of CAFE.



^haha, nothing wrong with the recommended oil grade, i'm sure had it not been for CAFE standards, Honda would most likely run 5w30. Just my opinion.

Who knows, maybe i'm wrong, maybe engine tolerances are getting so perfect that in a few years we'll all be running 0w-10 or even better.... -5w0

 

[buster]

They must have changed the formulation....ASM doesn't have boron/moly.

 

[CATERHAM]

Great result from a light "30wt oil".
The KV100 of 9.32cSt is higher than the virgin PDS spec' of 9.0cSt.
I wonder what the KV100 would have been without the 3% fuel?
Since the Amsoil ASM 0W-20 doesn't have a very high VI (165) and shows no tendency to shear; it in fact thickens with mileage, I suspect this oil contains no VII's.

 

[buster]

Originally Posted By: CATERHAM
Great result from a light "30wt oil".
The KV100 of 9.32cSt is higher than the virgin PDS spec' of 9.0cSt.
I wonder what the KV100 would have been without the 3% fuel?
Since the Amsoil ASM 0W-20 doesn't have a very high VI (165) and shows no tendency to shear; it in fact thickens with mileage, I suspect this oil contains no VII's.


I agree. Using no VII's is probably a good move for a 20 grade oil that has to last a very long time. Fuel dilution appears to destroy the VM's in some oils.

I've seen many API 0w/5w20's lose up to 12% of their original viscosity. ASM/Redline always stay in grade. I've seen a few M1 0w20's that lost about 7-10%. Those oils probably get a tad better fuel economy.

 

[CATERHAM]

Yes, but thinking of this oil as a 20wt is something of a stretch.
Since all 5w30 dino's and most 30wt syn's shear to some extent, after a few 1,000 miles there will be virtually no difference in viscosity between Amsoil 0W-20 and a typical 30wt oil.
In fact I think it would be more practical to think of it as a shear stable alternative to M1 0W-30.