Penzoil Ultra Premium Synthetic Oil is fine. Go ahead and fill 'er up.

My car has about 9K miles on it. Is it okay to use Mobil One Synthetic Oil 5w 30 and mobil One Filter? Should i take it to nissan dealer ship to change it and bring my own oil?

schock you can do it yourself, i've got 20k and no problems yet. Just keep your receipts and date them with mileage so that if there is any warranty problems they can look at that for verification.

i just read though all 10 pages of this thread and not one person mentioned red line, is there any reason for this? i am about to change my oil and i was going to use red line for it.

Redline oil is fine. Go ahead and fill 'er up. :tiphat:

i already bought 12 quarts for $130 so i intend to :)

you only needed to buy 10 :D

Is it possible to use 5w20 in the motor? Why would we use such a thick oil on a roller motor?

That's how they get you! Selling in boxes of 12 so you need to keep buying their brand :roflpuke2:

:tup: Red Line is good stuff. Ester based as well.

Because of the high bearing temps.

And actually, if you read between the lines in the Service Manual, probably the most-ideal oil weight for this engine is 10w30. In the "For North America" section they claim 5w30 is the only option, but in the "Outside North America" section they say, exactly:

Probably the reason for the difference is US standards on fuel economy and/or emissions. Either way the difference between 5w30 and 10w30 isn't much.

Great info, did not know that :tup:

Both the 5w and the 10w won't make too much difference in most places, however, there are large parts of America that get much colder than both Japan and northern europe, including England.

That's the reason for the 5w, the 30 is what changes anything under normal running temperature.

I wonder if in nominal temperature areas, a synthetic (more free flowing at the same temperature and same 'weight' than conventional oil) oil at 10w instead of 5w, would sit on the top of the engine longer, aiding cold starts?

I thought about that, but then again "North America" covers the southern tip of the continent too. Scandinavia might be slightly warmer than, say, Greenland or Northern Canada, but I imagine it's pretty comparable to all but the most extreme cold areas of the US.