Congratualtions on your purchase. I guarantee you'll enjoy driving it. Although it is neither the fastest nor the quickest accelerating car these days I love driving mine simply because it's alot of fun.
As far as oil change intervals go, you should change the oil more frequently in the 16V. Running at high RPMs (and therefore high heat) it is crucial that you keep up a regular and frequent maintenance schedule. The engine is s strong and flexible engine and can certainly handle some pretty hard driving, but you should change the oil at roughly every 3000 miles (4800 km).
There is an issue of European Car magazine which features the 2.3-16. It was part of a 5 issue feature story on best buys. It also outlines the timing chain tensioner issue. If your car has over 90000 miles you should get the tensioner and guides upgraded (if you've not already done so).
'93 500E black pearl/black leather; 89,000km
'93 500E bornit(blackberry)/black leather; 69,000km; european delivery
'88 560SL desert taupe/dark brown leather; 89,000km
'87 190E 2.3-16 black pearl/black leather; 55,000mi
'70 280SL white/red; 135,000mi (original)
[This message has been edited by yhliem (edited 08-06-2000).]