I change my transmission and differential oils every 30K miles on all of my vehicles. I also don't want the lifetime of my transmission and differential to be 100K miles. FWIW, I have been using either Redline, Royal Purple or Mobil 1 on my now sold E46 and my heavily tracked M3 without issue. Royal purple seems to do the best job of making my transmissions shift smoothly. I will probably do my M5 in another 2K (60K miles) with RP in the tranny and Mobil 1 in the diff.tranck said:Change the gear box oil? If so, with OEM or Royal Purple?
Change the differential lube? - I did at 1200 miles as indicated.
Well now, BMW thinks that the lifetime of a car is 100k miles? I guess this lifetime estimate would be more of a reflection on the state on the electronics than perhaps the mechanicals.Beamer_usa said:I think when they say lifetime they mean every 100khmmm
This might be repetitve for some that have read previous threads but I have been extremely satisfied with the car - a 2000 model.Chuckc said:How does the car run after almost 100k ? Any significant issues with reliability ?