<VV> Cleaning oily parts?

[Kinzelman, Andy]

Guys,
My daily driver 65 has been leaking oil for some time; which I am working to rectify.  Among the other oily/grungy parts is the rear grille.
In the past I have used gasoline as a solvent (I know, it's health and fire hazardous).  Any recommendations for a less hazardous, but still effective cleaner?  I also need to clean some engine internal parts; as well.
Thanks,
Andy K.
Wisconsin