Of course, these oil changes & valve adjustments are relative to the life expectancy of the engine. I think (hope) Jims 600 hr est is conservative, my oil ch schedule exceeds OEM specs, I am ballparking the depreciation factor to 900 hrs @ 150 hrs per year = 6 years.
The 4th-century Tomb of the Lionesses consists of a small chamber with gabled roof. The painting depicts flying birds and dolphins and scenes from the life of the Etruscan aristocracy. The 6th-century Tomb of the Hunting Pavilion shows the view seen through the transparent fabric of the pavilion.
They also crafted fine gold, silver, and ivory jewelry, using filigree and granulation. The influence of Etruscan art on the Romans was supreme from the 6th century BC until the ascendancy of Greek styles in the 3rd century BC. See also Greek Art and Architecture; Roman Art and Architecture. Etruscan art reveals its relation to that of the Greeks, (in both Greece and southern Italy) and to that of Egypt and Asia Minor. It also exhibits Italian elements and reflects distinctively Etruscan religious beliefs. Etruscan art had great influence on subsequent Roman styles.