fully sinthetic oil, how frequently change?

The owner's manual says that you have to change the oil according to the
maintenance schedule whether you use synthetic or organic oil. It still
gets dirty the same as dino oil.

Sid

"kara" > wrote in message
ups.com...
> Honda Accord VP, 2002. I use fully sinthetic oil, Mobil 1, 5W-20. How
> frequently it should be changed, each 5000 miles or may be somewhat
> longer period?
>
> Escape tube is black inside (car has around 50.000 miles, but it was
> already slightly black when i bought it used and car had 18,000 miles),
> does it means that car burning oil? may be it depend on gas used. I use
> 87 (manual says 86 or higher).
>
> thanks,
>
> kara
>