going to have to click through all those succeeding links and find the 1993 300ZX manual and then try and figure out what Chapter the oil-viscosity page was in and finally finds it in the MA (Maintenance) Chapter and then finally sees that........................IT HAS THE SAME INFO IN THE LINK TO THE AMSOIL APPLICATION PAGE I REPLIED! Like I have been saying over and over again, it was a matter of convenience! I handed him fishsticks WITH KETCHUP! From the final link from your link..... [ http://www.nicoclub.com/FSM/300zx/300zx_1993_FSM.pdf ] I hope MadKiwi will note that that page (MA-8) states, "10W-30 is preferable for ambient temperatures above -18*C (0*F). 20W-40 and 20W-50 are usable for ambient temperatures above 10*C (50*F) for all seasons." Next is the statement directly from my 1990 Factory Service Manual (page MA-8), "10W-30 is preferable. If the ambient temperature is above -18*C (0*F). 20W-40 and 20W-50 are usable if the ambient temperture is above 10*C (50*F) for all seasons. For turbo engines, 5W-30 should be used only under extremely cold conditions." (...............much less 0W-30). And why would the Nissan engineers make that last statement specification unless they had good reason to? Also, the Z32 isn't a 2015 model and it's not a 240SX; models on that opening page from your link.
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