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In Reply to: my x5 is a moodswinger posted by dubya on June 24, 2001 at 23:51:42:
zaid
it seems my X5 reacts differently to fuels and oils. i always use premium gas but my X5 seems to be sluggish on nj gas than NY gas. also i just add some engine oil(bmw hi-perf oil) and it feels noticeably more sluggish and louder since then.
i hope this is just my wrong impression.