M1 5W-20 '08 Accord 2.4L 9962 miles

[chaser06]

Here is the first UOA on my Honda. The vehicle has a total of 19,668 miles with almost 10k on this sample. No oil was added during this run. I drive about 100 miles per day commuting mostly highway miles (about 90%). My Maintenance minder was at 15% when I changed the oil.

Miles on oil: 9962
Miles on vehicle: 19668
Date of test: 6/13/08
Oil: Mobil 1 5W-20
Oil Filter: Purolator PureOne


Iron 18
Chromium 0
Lead 4
Copper 9
Tin 0
Aluminum 10
Nickel 5
Silver 0
Silicon 25
Boron 47
Sodium 24
Magnesium 17
Calcium 2081
Barium 0
Phosphorus 668
Zinc 823
Molybdenum 92
Titanium 0
Vanadium 0
Potassium 0

Fuel Visc100 7.39
Water 0
Coolant No
TBN 3.39

Any comments?

 

[dargo]

Si look high, Why does this 4-cyl have such a low TBN on the oil? Maybe since it is new? I would use Dyson oil testing here.

 

[addyguy]

Pretty good for 10k miles on a newer engine. I'd check your air intake for leaks to try and get that Si number down - its causing Aluminum wear on the pistons.

 

[steve20]

the heck it is---silicon is coming from the RTV gaskets from engine assembly-next analysis will show lower values

 

[Cutehumor]

awww,38 miles short from a perfect 10k oil change

 

[paul246]

Looks good!

 

[glennc]

Can't complain, it is an easy-breaking-in engine. Si very commonly is high when new and can take 40k or so to flatten out. Curious whether the sodium is from the oil or some other source, though. TBN at 3.39 at 10k is actually quite good I think.

What about insolubles?

 

[chaser06]

Originally Posted By: glennc
Can't complain, it is an easy-breaking-in engine. Si very commonly is high when new and can take 40k or so to flatten out. Curious whether the sodium is from the oil or some other source, though. TBN at 3.39 at 10k is actually quite good I think.

What about insolubles?


Insolubles weren't tested specifically (at least as far as I can tell). OAI did the testing.

 

[FZ1]

These Honda inlines appear to be very easy on oil.

 

[ToyotaNSaturn]

Good UOA, thanks for posting!

This engine is a shoe-in for 15K mostly-highway OCI's IMO.

 

[daman]

Looks great,could easly go 10,000 and beyond,nice tbn yet for
the mileage,try 12,000 next time or 0% on the OLM..

 

[Al]

Originally Posted By: addyguy
Pretty good for 10k miles on a newer engine. I'd check your air intake for leaks to try and get that Si number down - its causing Aluminum wear on the pistons.
Don't forget the oil has 10K miles on it and has been there since the car had only 10K miles on it. I agree with you somewhat. But for a 10K UOA I think the Silicon/Aluminum is acceptable. Besides if it were wear the Cr. would likely be more than 0.

This is one of the best engines on the planet. Its a typically good UOA for this engine.

 

[JohnBrowning]

I think the silicone is from RTV. The numbers look good. THe lead should be about 1/2 or lower next time. I think you are still seeing some additional blow blow even though fuel read low. I think it is all the easy steady state driveing you do. Try to really get on it and do some 3/4 to wide open throttle runs up to speed say about 10 of those and that should help to really seat those rings a little better. I think this is why your TBN was a little lower then expected. It is still really good though do not get me ring nice UOA and it should just keep getting better.

 

[The Critic]

Looks good. I'd stick with your current maintenance plan.

Off-topic, but is this the 177HP or 190HP version of the 2.4? Also, how's your fuel economy?

 

[Steelhead]

silicon/aluminum levels in UOAs can come from the hypereutectic alum/silicon alloy short skirt pistons Honda uses along with their high silicon content alum. alloy blocks with break in cyl wall wear for the first 20k>30k miles.
also shows up as the iron/nickel wear in from the rings

normal wear in characteristics of modern high rpm 4 cyl engine.

another Honda 4 cyl that will last 300k+ miles on Mobil 1
real money saver at 12k oci

 

[Al]

Originally Posted By: The Critic
but is this the 177HP or 190HP version of the 2.4? Also, how's your fuel economy?

I thought 177 HP is all the 2.4 ever put out in the Honda line. Acura = 200/205 HP with VTEC

 

[OrdnanceMarine]

Originally Posted By: Al
Originally Posted By: The Critic
but is this the 177HP or 190HP version of the 2.4? Also, how's your fuel economy?

I thought 177 HP is all the 2.4 ever put out in the Honda line. Acura = 200/205 HP with VTEC


K24Z2 is good for 177 HP @ 6500 RPM and is found in the lower trim Accords.
K24Z3 pumps out 190 HP @7000 RPM and is in the upper trim level Accords.

 

[chaser06]

Originally Posted By: The Critic
Looks good. I'd stick with your current maintenance plan.

Off-topic, but is this the 177HP or 190HP version of the 2.4? Also, how's your fuel economy?


I've got the 190 hp version.

My mileage with non-ethanol fuel is about 33mpg (summer) and 30mpg (winter) doing about 90% highway driving. With ethanol blended fuels I get about 10% less mileage.

 

[buster]

Originally Posted By: Steelhead
silicon/aluminum levels in UOAs can come from the hypereutectic alum/silicon alloy short skirt pistons Honda uses along with their high silicon content alum. alloy blocks with break in cyl wall wear for the first 20k>30k miles.
also shows up as the iron/nickel wear in from the rings

normal wear in characteristics of modern high rpm 4 cyl engine.

another Honda 4 cyl that will last 300k+ miles on Mobil 1
real money saver at 12k oci


Thanks for the explanation on the Al. Never knew that. Any concerns for the tin?

 

[FZ1]

20k is a good time to change the AF. I prefer the Honda AF in mine.