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  1. X3 E83 (2004 - 2010)
    Hey everyone, I’m very clearly new to these boards but as made evident by the title, I’m also a new BMW owner as well! Additionally, this is the first European car I’ve ever owned as well so a lot of firsts here. Now onto my questions: 1.) the manual says it requires 5W-40 full synth. I have...
  2. E39 (1997 - 2003)
    This thread today, where a user went from a low altitude warm area to a high altitude cold area, got me wondering how the E39 adapts to altitude when it comes to engine control adjustments: I've noticed in the past when I drove from San Jose (about 100' ASL) to Tahoe (around 6,000' ASL), my...
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