Originally Posted By: UltrafanUK
Originally Posted By: HKPolice
Honda has back spec'd 0w20 for this car. I would run whatever 0w20 full synthetic is on sale @ 6K intervals since you're doing daily short trips so the oil will never get up to temp.
I'd be rather creful about back specs, as they are only done for fuel economy reasons, not engine wear, BUT as this car is not leaking any oil it should be OK for a full synthetic.
If it's doing 2 OCI's per year, then an 0w20 in winter and an 0 or 5w30 in summer. If it needs an all season oil, then an 0w30.
5K oil only changes, with 10K oil & filter changes would make sense in nice round number terms.
There is no difference in operating temp viscosity between a 0w20 & 5w20, therefore there is no difference in engine wear assuming both oils use the same AW additive pack. If anything, using a 0w20 for this application will DECREASE wear because of the daily cold starts and short trips where 0w20 offers more protection than 5w20.
The only reason Honda recommended 5w20 when older cars came out of the factory is because 0w20 wasn't widely available at the time. Toyota did the same thing and has back spec'd 5w20 & 0w20 for over a dozen cars across multiple model years, all of which came with 5w30 from the factory.