I thought of adding this to the Mobil thread but it really is a different situation.

What would the benefits be of switching to a synthetic oil in my 2001 CL that has 78,000 miles?

Also if there has been any gunk build up in the engine is there any way to flush that out?

I bought it with 76,000 as a previously leased vehicle and had a Honda dealer changed the oil once and he put in castrol but the mobil 1 thread got me thinking of what benefits could be derived from a synthetic oil.

Are therre preferred brands of synthetic oil?