All Honda engines are using 5W20 now, even retroactively back to at least
the 2000 MY.

"Jazz Man" <tigereye@hotmail.com> wrote in message
news:cH9_b.16065$XR.4105@newssvr29.news.prodigy.co m...
> Hello;
>
> Just had my 2000 accord with 4cyl in for tis 30k mile service per owners
> manual.
>
> Dealer may have used 5/20 instead of 5/30, can this cause any harm to the
> engine
>
>
>