Considering purchase of '06 G6 with 2.2 Ecotech. What is the manufacturer-recommended engine oil viscosity? If other than 5w30, is
5w30 approved for use in this engine? And does this engine have a typical spin-on engine oil filter? I seem to recall that a 90's 2.5 L4 had a cartridge-in-a-canister filter. Thanks in advance.