AMSOIL Signature Series 0W-30 Severe Service is the very best and is a 35,000 mile/1-year oil. Change the AMSOIL EAO oil filter every 25,000 miles/1-year. If you do not put 35,000 miles per year on then the 5W-30 (ASL) or the 10W-30 (ATM) are also excellent choices and both are 25,000 mile/1-year lubricants. All AMSOIL Synthetic Lubricants meet and far exceed all manufacturer specifications as well as API Specifications.

The AMSOIL Signature Series 0W-30 Severe Service is a racing oil and of a different chemistry than the 10W-30 and 5W-30. They often use the 0W-30 in the 800 Hp Ford/Roush Nascars as it has a shear strength better than most 50W oils and transfers heat more efficiently than heavier oils. Only about 60% of the engine cooling is done by the coolant and the rest is done by the oil via heat transfer. The 10W-30 and 5W-30 would not be good choices for racing. The 5W-30 ASL product code and 10W-30 ATM are both 25,000 mile/1-year oils where the 0W-30 is a 35,000 mile/1-year oil. The 4-ball wear test is also run at a different load, temp and RPM than the other 2 products so they cannot be compared in that area. The 0W-30 does not thin out to a 0W as it gets hot. It stays a 30W just like the 10W-30 and the 5W-30. They are ALL 30 weight oils and each one can be beneficial in a specific application. The 10W-30 is a better oil under certain instances for higher mileage engines as it has a lower volatility.

You mean we have guys *planning* on driving 35k miles in a year?

Also, regardless of what type of oil I'm using, and what the manufacturer says, I'm not going an entire year without changing my oil. But that's just me.

Do you sell Mary Kay too?....Please let us know as we have some Wives/Girlfriends that have some miles on them and need to nip that wear in the bud.......

^^hahaa.

Is that true? Nissan doesn't put Ester Oil in at the factory???? Can anyone confirm this? I went through the owners manual, and could not find conformation one way or the other.

Seems like they should have put in Ester. Up to now, I was under the impression that they did!

honestly i dont think it matters much if they put ester in it or not from the factory..from what i read the ester primarily lubricates the valve train from making chatter.

Nah, not Mary Kay. My money's on Amway, with a big box of motivational cassette tapes. :icon23:

I don't entirely agree with that statement. While it may be useless in the context of a 'which oil is best?' discussion until we see UOAs with other oils, by itself it's at least useful in that it shows Redline does a good job at protecting this engine. Does it do a better job than any other oil? Couldn't tell ya. But the UOA I did with Redline at least didn't throw any red flags, like some other oils did on the 350Z (Motul comes to mind). Hopefully as time progresses, other 370Z owners using other oils will share their UOA results, and we can start doing side by side comparisons. But for now, this UOA at least tells us that Redline is a safe choice.

Why not the Ester as factory fill for this Nissan!!
 

I have never seen such ignorant little kids in all my life. You people all need to grow up. Your comments are all ridiculous. I'm amazed that any of you can even afford these cars. What are you all, 16 or 17 years old or something? Geez.

All your posts are in this thread.

I'm just going to leave that on the table.

I have no idea why this thread hasn't been locked yet.

Because we love the drama and we've got our own thread drama queen!

Finally, some scientific data...
 

The oil used is Mobil1 0-40. It is a PAO/Ester blend (Type IV/V). All Mobil1 oils are not the same, and I refuse to call all Mobil1s "synthetic." Some of the Mobil1s are Type III which is based upon petroleum. Mobil1 0-40 is factory/service fill for a lot of high-end performance vehicles. That said, it may or may not be the best oil for the VQ37HR, but you certainly can do worse.
.....UAO is what we should be looking at on this thread, as well as manufacturer test data, not opinions, nor visual cues (color of the oil). Good job CaspianM, kudos to the UOA post above!

:bowrofl::bowrofl::bowrofl::bowrofl::bowrofl:

:happydance::happydance:

:owned: