- Aug 30, 2022
This is a slightly larger version of the 3.5L J35 found in older TLs. I know of owners with these older TLs that had the same consumption issues, and went through the same dealer consumption tests.3.7-liter, SOHC V-6 from the spec sheet
Oddly enough the same engine was used in Honda's marine engines where Honda recommended 10w30.
As others have said consumption later into the OCI indicates the oil is losing viscosity and no longer suitable. You know for the future to take the owner's manual recommendation with a grain of salt, under warranty or not. Manufacturers have very stringent environmental targets to meet.
Use a High HTHS oil, usually found in "Euro" formulas. I also wouldn't hesitate to try Mobil 1 0w40 as others have suggested.
Also check the PCV as others have suggested.