I can get near 220 in the summer with PU in my car...each Z is a bit different. Sure there is not coincidental plastic bag blocking the radiator a tad?
Amsoil is a good product. Euro-formulation is low SAPs and meets a bunch of euro specs. I can't find any API data on that product which is the only odd if they did pay the API ransom (they may not have for these blends).
I'd not hesitate to run a euro-spec provided it also meets API specs (for warranty purposes). Example: M1 0/40 Euro here in the US is a darn fine product and not just for P cars.
FYI: while in warranty I simply bring my 5qt jug of PU to the dealership and let them change my oil. Its easy, its recorded in their system and done using the oil I want to use (and documented as full synthetic oil change). If I was running a fleet/commuter and wanted to do 10-20K OCI's, Amsoil would be the fill.
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Last edited by bvl; 11-24-2012 at 07:47 AM.
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