What did I do to my E53? Loaded up the family, drove the 4.8is all over, Dinan exhaust and intake singing, pure pleasure. No issues, smooth, and pulls strong. It is next in line for an oil change. Been a long time since any unscheduled service. Very happy with her.

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E53 X5 4.8is-Dinan S2-Street Brawler
E70 X5M-The stoplight shocker
AMG E55K-539 RWHP, 629RWTQ-my toy
GX470-the unbreakable truck.
F30 328i-JB4 STG 2. Daily MPG Work Beater
02-WS6, 6sp my other toy
...other stuff parked around here somewhere