Hi Forum, I am currently driving a Alpina B5 BiTurbo (G31, 608 hp) and looking for an alternative to the XADO engine – wear protection oil additive Twin Turbo, which I have used in many vehicles for years. XADO however states that the addition can not be used in vehicles with special hardening coating of the cylinders (ALUSIL, LOKASIL, NIKASIL, GALANIKAL). However, according to Alpina, the B5 engine has crankcases that are coated with aluminium (later engines LDS). h with the XADO engine – wear protection already gained experience (before/after compression measurement) I am actually convinced… What would you recommend to me as an alternative for the engine? With regard to the engine oil, I switch to the ROWE HIGHTEC SYNTH RS SAE 5W-40 during the next oil change. VG Tom