'14 Accord - Honda 0W20 - High vis or lab error?

[vvolcano]

Are the viscosity readings most likely an error by the lab? For this OCI and the one prior (10/24/2015) I ran Honda OW20 syn. This is a direct injection engine so that might explain some of the fuel. The wear metals look OK to me. I did find the drop in moly a little curious.. is it normal for additive levels to vary like this even using the exact same oil?

The oil is sitting in a catch pan with brake fluid and other oil, so no chance of a re-test.

 

[Kuato]

Interesting. At .06cST over, it's just barely out of spec, but I agree it should have been diluted by the high fuel. Is there a VOA of the Honda oil?

 

[Danh]

If you're sure an 0w-20 was used, I'd bet on lab error. Blackstone relies on human beings watching oil flow through a viscosometer for this measure, which makes error quite possible (same with flashpoint and fuel %, fwiw). If your driving patterns are anything close to those for previous UOAs you would expect considerable shearing.

If you didn't perform the last oil change yourself I suppose the dealer could've used a 5w-30 by mistake. On the bright side, given fuel dilution and how these engines can shear oils, an xxw-30 oil may be a better choice anyway.

 

[SatinSilver]

Are you still getting free oil changes from the dealer?

Originally Posted By: vvolcano
The dealership we bought it from included 6 free oil changes.

 

[zeng]

Originally Posted By: Kuato
Interesting. At .06cST over, it's just barely out of spec, but I agree it should have been diluted by the high fuel. Is there a VOA of the Honda oil?


KV@100*C of xxW30 is 9.3-12.5 cSt.
Appears to me a Blackstone error.. anyway wear rates looks fine.

 

[Nate1979]

Who changed the oil last time?

 

[vvolcano]

Originally Posted By: Danh
If you're sure an 0w-20 was used, I'd bet on lab error. Blackstone relies on human beings watching oil flow through a viscosometer for this measure, which makes error quite possible (same with flashpoint and fuel %, fwiw). If your driving patterns are anything close to those for previous UOAs you would expect considerable shearing.

If you didn't perform the last oil change yourself I suppose the dealer could've used a 5w-30 by mistake. On the bright side, given fuel dilution and how these engines can shear oils, an xxw-30 oil may be a better choice anyway.

Ah thanks for that information-- makes human error seem like the culprit in this case.

I changed the oil myself this time as well as the previous time. Nothing remarkable about this interval.. around 40 miles roundtrip of daily commuting with a couple of regional trips sprinkled in.

 

[SatinSilver]

How about using some TGMO? Here's a 10k run with it on the Camry.

http://www.bobistheoilguy.com/forums/ubbthreads.php/topics/3954381/2012_Toyota_Camry_UOA#Post3954381

 

[LotI]

Honda is known to use a break in oil that's high in moly so that's just washing out.