[rollinhonda]

2 years on the shelf? How long in the engine?

Most oil mfrs. say 5 years for shelf life.

Honda says replace the oil in the crankcase at the recommended mileage following the Mileage Minder or Honda's chart recommendations or 1 year max regardless of mileage.

 

[rollinhonda]

That is strange. Might be a good idea to check the coolant as well.

Is it just the dipstick that changed color or the oil? Maybe have a lab check the oil itself (Blackstone Labs or NAPA can arrange a fluid analysis).