Hi all
Have a '98 non Vanos 540i6. Car has 270k km (168k miles) and runs very good; passes emission tests and still gives factory near performance, no strange or ticking noises.
Engine was running on Shell 5w30 until I got it, now I put in Mobil1 5w30. After 13k km (8k miles) car used 1 - 1,5 liter of that oil. I did some search and found out that most E39's do run 5w30 mobil1, but can't find exact is BMW specification for that (M62) engine. Anyone knows?
Car is driven softly when cold, and frequently very fast when warm. Weather is mostly 20 or more °c (68+F). What would be other owner's and/or some engineers advice; to continue with Mobil15w30 or maybe switch to thicker oils like Mobil1 5w50 or even 15W50?