Good catch! The PO of mine made it a faux 4.8 (I'm not complaining, I like the look...). Still, I've looked and ones in this kind of shape were usually cared for by nuts like us. Most I've seen are run to failure or just prior to major maintenance. I've put a wee bit more into mine than I would have liked, but it's well sorted now.

__________________
Daily Drivers:
- 2008 535i, 320,000km
- 2004 X5 4.4, 01/2004 production, 420,000km
- 1997 328i, 350,000km

Track:
- 1996 328i, track/race car, ~300,000km

Winter:
- 2013 Ski-Doo MXZ X 800 E-TEC, trail can
- 2007 Ski-Doo MXZ Blizzard 800 HO
- 2001 Ski-Doo MXZ 600 w/800 engine, exhaust
- 1978 Ski-Doo Olympique 340 (vintage race sled)
- 1977 Ski-Doo Olympique 340E