First, are you using dino oil or synthetic? IF dino, oil and filter
should be changed between 3K and 5K miles, depending on the type of
driving you do. If synthetic, you can change between 7K and 15K, again
depending on how you drive, i.e., city driving/stop and go should be
Next, are you mechanicially-inclined or have any automotive experience?
Changing oil is probably one of the few things most people can still
do. IF you use dino oil, 6 qts at $1 each plus $5-8 for a filter for a
max of what $14-15? Similarly, synthetic oil is a bit more expensive,
but cost should be $3-5 per qt, so $18-30 for oil plus another $5 to $8
for filter is $40 for parts max. I say learn to do it yourself and save!
You'll pay more like $60 for it in the UK for 4 litres.
But anyway, why not use at least what's recommended in the manual and
change it when the service indicator tells you to? That's surely what
BMW told you. Or get it done at any old garage or do it yourself.
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