This is what everyone should know!

You guys are speaking way above my head. Why do some people chose Mobil 1 0w40 for their Z's? What is the difference between Mobil 1 0w40 vs Mobil 1 5w30? Only the cold start issue or does the 0w40 have no esters in it while the 5w30 does. If the 5w30 has to esters quiet the valve train than it should be used, no? Unless there is a big advantage to the 0w40. No one has addressed this yet. you guys are just arguing. Is it all about the esters?

Google oil viscosity.

Thanks. But I googled it already and I understand the way it is measured. That doesn't answer what the difference between the 0w40 and the 5w30 is besides cold start and high temp ratings. Does the latter have esters and the former not. That is not explained when reading about viscosity. If the former causes valve chatter in the z it doesn't also do the same in the GT-R?
One wouldn't recommend Pirelli tires for a Prius because there is no benefit equal to the extra paid for the tire but I am sure that the Pirelli is a better tire than the stock. Perhaps Nissan recommends the 5w30 for the Z because there is no real need for the 0w. The question again is what is the better oil?

For what it's worth, the Mobil 0w-40 synthetic is a full synthetic while the 5w-30 has a natural petroleum base (even though in the states it's still considered a "full synthetic", in Japan it is not).

Just throwing another stick into the fire.

read your owners manual

Simple answer go with Nissan Ester and call it a day. Stick to the 5w30 if that's what it says in your manual. The recommended oil varies depending on your climate and the type of driving. The difference is mostly in the brand as far as what goes into the oil. If you really want to know if it's working as it should, have Blackstone labs test it to compare.


If you feel like getting confused even more, here's a comparo of some brands as it relates to wear. Just remember that all oils eventually do break down and this is just to demonstrate the extremes.

http://www.animegame.com/cars/Oil%20Tests.pdf

:iagree:

Really ? !


:bowrofl:

I have used both mobil 1 5w-30 and redline 5w-30. In both cases my car burt oil and had the valve noise deal. I now use Castrol non synthetic 10w-30 (like in all my cars, and work fleet). No more burning oil or valve noise. The cars revs extremely smooth. Im just not sold on all this oil debating. To me I have found something that works so im keeping with it.

Which is what many people do. Mobil 1 doesn't use an ester base, period. I have heard of and read of differences between the 5W-30 and the 0W-40. Nothing has confirmed either definitively, which will also never happen seeing as oil additives and things are trade secrets.

Generally, less valvetrain noise should be better, at least from an audible perspective. I haven't read anything about how the valvetrain noise apparently indicates premature valvetrain wear (as implicitly indicated).

If the mechanic at the shop did as he was told to, he put in what the GT-R would take for oil changes: 0W-40 Mobil 1. The weight has little bearing on how it performs (well actually that is even more complicated, but irrelevant in this case).

When looking at Mobil 1's 5W30 and 0W40, there is no real difference. Solve this problem by doing what was suggested earlier. Run Nissan's suggested oil for the Z; Nissan's Ester Oil, 5W30. End of story. Now let us close this oil thread so that it may sit among the other hundreds of oil threads that never reach any definitive answer.

Happy driving.

I guess Mobil disagrees with you. Just sayin'.

Is Mobil 1 an Ester Oil

Research told me that most all synthetics have some amount of ester additive; the thing that separates a group 5 oil like Redline from everyone else is the percentage of ester that the oil is...

Of course I just did this research now so I dunno, oil threads.

Here's a good image, despite being over a decade old.

http://www.e90post.com/forums/attach...1&d=1176244244

There is however a difference from what I have been reading. The difference being that the only 100% fully synthetic oil that mobil 1 has is the 0w40. Besides that my dealership doesn't use 5w30 for the Z's but 5w40.