Quote:
Maybe leasers don't care, but I have always wondered why any owner would leave oil in an engine for 15K+ miles, especially on a car like a BMW. This change to shorter intervals (on basically the same engines many of us have), reinforces the belief that the earlier 15K+ change intervals were too long. Also suggests that BMW may have been having some complaints about engine damage that they traced to the long drain intervals.
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This guy nails it, as I keep my cars for 10-15 years and thought that the recommended intervals were a bit long. I have had oil analysis done and for my engine and driving conditions (turbocharged + lots of city/suburban driving), the shortened intervals I've used are vindicated by the results. Those of you who drive more highway miles will have no problem extending your intervals.
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'11 BMW 335i (Alpine White) M-Sport, Premium, Heated Seats, HK, 6MT, dealer-installed PPK, ER Charge Pipe, Euro Delivery 5/11/2011
'05 Lotus Elise (Arctic Silver) Sport, HT, Stage II, Odyssey PC925, Lotus Cup 240R Wheels
'87 Nissan Pickup (Burgandy) King Cab
'17 Audi A4 Ultra, Monsoon Grey, Wife's car