GS 450H Oil Change Frequency
 

Our 2007 GS 450H had complete service including oil change in January 2009.
Now in March 2010 we have traveled about 4,000 miles since that 15,000 complete service.
A message appears in our info window that oil service required.
I do not think we need an oil change at 1 year / 4,000 miles.
Two questions:
1.) At what interval should we change oil?
2.) Should we change oil at Lexus dealer or independent shop?

Thank you,
David W. Johnson
(904) 993-1430
davidwjohnson@hotmail.com

P.S.
Do you know of a good independent Lexus mechanic / shop in Jacksonville, Florida -- or in Jacksonville Beach, Florida?