TomP wrote:
> The answer to your question: when to put synthetic oil?
> Never.

not that synthetic would hurt anything, of course. i have no qualms
using synthetic and changing every 7500 miles.
>
> Save your money and go out to dinner on the savings between cost of the two
> oils.

if hes going to keep changing every 3000 miles? sure.

> Your Honda engine was designed for petroleum based oil. It can last a minimum
> of 250k miles; if serviced regularly, as Honda recommends. There are many
> Hondas driving around with high mileage and I'd wager that few have used
> synthetic oil... Many of them have probably had less than consistent
> maintenance... to boot!
>
> Remember this: Contamination and/or dirt is the enemy.
>
> ALL oil gets dirty and contaminated, (yes, even expensive synthetic oil.) So
> why would you put synthetic oil in your engine, then not change it for 25k
> miles, as some synt/oil packagers' suggest?

its only SCAMSoil that recommends that.