Originally Posted By: aquariuscsm
Originally Posted By: BobThe
Why would you use a 10W-30 or 40 with today's oils? The Z32 specifies a 10W-30 or 40 and specifically states to only use a 5W if it is cold. But it also specifies an API SG oil. With our SN oils, why continue to use a 10W? Let's use M1 0W-30 or 40 as an example here. You can feel free to insert your favorite brand as well. As a 0W, it will flow faster and provide better start up protection and once it's warm, it's a 30 or 40 just like Nissan specifies.
What does using a 10W-30 do for you that a 0W-30 doesn't?
As you can see in my sig, I drank the 0W cool-aide. I am honestly just curious why 10W is still being used.
Somewhere there's a Nissan TSB from a couple of years ago that says "5W30 for all Nissan vehicles except 300ZX (with an asterisk that said *see owner's manual*). Same thing with the S2000. Honda's current lube chart still says to use 10W30.
I see you mentioned this here:
https://bobistheoilguy.com/forums/ubbthreads.php/topics/3640461/1
440Magnum was also getting to my point above about Nissan recommending SG oils.
"Some automakers used to advise against wide viscosity spread oils because back then it took a lot of VII polymers to get there. Today with synthetic base stocks that have quite high native viscosity indices (and low pour points), blenders can do much wider spreads for the same or even less VII and pour-point depressants.
So while there might not be a big advantage to using 0w40 or 5w40 in place of a 10w40, there's no practical DISadvantage apart from cost. Furthermore, the wider spread oil may actually start out with a better base stock than the narrower spread oil."
I would bet the TSB from 1994 related to this since the capacity is 3 5/8 quarts on a 24 valve V6 that could also have twin turbo's on a 90's API SG rated oil.
Back to this thread:
https://bobistheoilguy.com/forums/ubbthr...iss#Post4337370
I would rather my buddy ran a 5 or 0W to get oil moving to the turbo's faster but I am torn. One side says that he can get a 10W-30 or 40 Redline or Amsoil and play it safe but would need to order it. But the other side says to go with M1 0W-40 and buy it at Walmart and provide better start up protection to those turbo's. Nissan may have said to use a 10W, but they also said to use an SG.
Ugh, I am still torn.