Maserati Oil
The proper oil for most modern Maserati engines is any true PAO {Polyalphaolefin}synthetic. A PAO synthetic is a "truce synthetic oil". Most american manufactures do not make PAO oils because the SAE/API in America has a very loose definition of what a syntheic is. In europe, a sythetic oil must be a PAO, to be sold as full synthetic. It must also say ACEA A3/B3 and VW 500/501/502/505 and MB229.3/5. As for being "Ferrari/Maserati approved? That is politics.
Quaker StatePennzoil European Fomula 5w/40 part # 162353{owned by Shell} is approved,by Ferrari, inexpensive, and very common.
Mobil 1 does make a European PAO formula, but none of there Trisynthetic oils commonly sold in the U.S are true PAO's. They are mixes of PAO and other base stocks.Hence the name "Trisynthetic"
Castrol's american oils are not PAO's Only there TWS line is. It is only avaliable at BMW dealers.
Shell Helix is not avaliable in the U.S. unless purchaced from a dealer
Redline/Amsoil are both true PAO syntheics that are avaliable in 5W/40
and are both excellent high quality oils.
6000 miles is the most I would reccommend going on an oil change*
*My backround stems from operating a quick lube for 20yrs and having family members who have worked for Ferrari, Porsche,BMW, Jaguar,Ford,GM,Harley Davidson, Suzuki, Etc... for 90+ years.
2005 Maserati GranSport
2003 Ducati ST4S