there is no practical difference between natural and synthetic oils. Like
most of us here, I am not made of money and the huge price difference
between the two services is a factor for me. Of course, I will use the synth
if I really need to but my instinct says I don't. Your thoughts? TIA
AFAIK Castrol TWS is still the only oil approved for use in M3s. It still
says "Exclusively approved for use in BMW M3, M5 and Z8" on the back of the
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