Oil change should be performed 800-1500km depending on the quality of oil used..
My recommendation would be go for
ZIC M5 20w40. For about 1200 km.
Valvoline 20w50. For about 1500 km.
Liquimoly 20w50. For about 1800 km.
About tunning i think 2000-2500 km interval is good enough.
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