I'd say stay with the 5w20. As a breed, they are a VERY robust oil. Also they are specifically formulated TO Ford and Honda specifications. (Ford being the more stringent of the two)
This board is a great place to find the so called "BEST" oil of the 5w20's and/or BEST practices.
It is also common knowledge the Honda engines are happiest with more moly than not. 5w20 has HUGE doses of moly.
So if you intend to go with 5,000 mile OCI's, there is not much point from a cost point of view to run synthetics, i.e., Mobil 1 5w20, 4/5 per vs ExxonMobil Superflo 5w20 at 1 per.
I would have no problems running 10,000 mile OCI's with any of the conventional 5w20's. If I decided to stay with conventional oil, one of the tops ones I would run is the ExxonMobil Superflo. But hey, given the standards SM/SL etc. there is nothing wrong with a .49 cent per quart SALE!!
The only thing bad about the following list of the conventional oils, are the ones I might have inadvertantly left out. Chevron, Havoline, ExxonMobil Superflo, Mobil Drive clean, Pennzoil, Castro, Motorcraft, Honda oem, Schaffer's, and of course etc.
I am running the synthetic Mobil 1 0w20 in a 2004 Honda Civic. It continues to run like the proverbial top.
[ February 23, 2006, 01:33 PM: Message edited by: ruking77 ]