ASL 5w30, 7532 mi, 2002 Honda Odyssey 3.5L

[caremd99]

GRADE 5W30 5W30 5W30
TIME ON OIL 7532 11207 7854
TIME ON UNIT 53657 42359 26171
BRAND AMSOIL AMSOIL AMSOIL
OIL TYPE ASL ASL ASL
DATE SAMPLE TAKEN 17-Nov-06 11-May-05 3-Dec-03
DATE SAMPLE TESTED 30-Nov-06 20-May-05 15-Dec-03
TBN 3 3.5 6.05
OXID 16 N/A 18
NITR 25 N/A 17
CHANGE NO NO NO
FE 11 28 20
CR 0 1 2
PB 0 0 3
CU 35 68 84
SN 0 0 0
AL 7 8 5
NI 0 0 0
AG 0 0 0
MN 0 0 0
SI 22 19 12
B 87 23 21
NA 0 5 1
MG 129 699 661
CA 2746 2120 2166
BA 0 0 0
P 647 1036 1038
ZN 784 1269 1316
MO 38 0 2
TI 0 0 0
V 0 0 0
K 0 0 0
GLYCOL NO NEG NEG
FLASH POINT
FUEL DILUTION VISC @40 N/A N/A N/A
VISC @100 11.39 12.69 12.17
WATER% 0 0 0
SOLIDS% N/A N/A N/A
RECOMMENDATION NO CORRECTIVE ACTION REQUIRED, OIL IS SUITABLE FOR CONTINUED USE. RESAMPLE AT NEXT REGULAR INTERVAL

FP60 (1oz/5gal) LC20 (1oz/qt and 2oz/2000mi). Honda air filter. AMSOIL oil filter. Last time I had an analysis someone suggested I have an air leak. I changed the air filter but I can not find any leaks. I tried to make sure everything is tight. Not sure what else to do.

I am thinking to wait until summer to change the oil. Comments?

 

[buster]

TBN is kind of low to make it through the winter to summer. Everything else looks fine.

 

[The Critic]

The TBN is low by OAI standards, I think there's something wrong with their equipment...or they just changed testing methods.

 

[Titan]

Honda engine spewing copper...I understand that is common. But, the increasing Silicon is troubling...you may have an air leak somewhere!

 

[buster]

You can see that the mileage was the same or higher in the previoius samples, while the TBN for this run was lower. I agree with the Critic here. It's clear that either Amsoil changed their TBN method to B/S's or their calibration is off. I believe they might have changed the method.

 

[Pablo]

I've made a gentle indirect email request for explanation on the lower TBN's.............

 

[LargeCarManX2]

Or OAI may have changed there protocol. Lately any Oxid over 30 and TBN over 3 is showing abnormal?

Pablo, I hope you can gently nudge Amsoil on this question too....the TBN's in the 5 to 10 K range are showing under 4 in the general since and a little disturbing.

 

[Donald]

When did you change the oil? I guess no analysis when the oil was changed? I agree that you need to hunt about for an air leak. In a Toyota I found the air temp sender had popped out and so there was a 1/2" for unfiltered air to enter the housing (after the filter). In a Suburban I found a gasket missing from a spacer attached to the TBI. So look at anything/everything from air filter to manifold, loose connections, cracks in rubber or plastic hoses, sensors popped out, etc.

 

[caremd99]

I have look for loose parts/missing parts, cracks, etc and everything looks good. I am not sure where to look next.

 

[unDummy]

Yep, I'd change the oil now. TBN won't make it through the winter.

If you can't find any air leaks, don't worry about it. It doesn't seem to be causing wear.