Yep, you were fine to go synthetic after that first 3750. I saw 1/3 quart consumption (maybe) over the first 2000 miles on our Z; we switched to the Castrol 0W-30 at 2100. I'll report back with a UOA and oil consumption report at roughly 6000 miles.

I do have to note, however, that the 0W-30 (which is indeed a thick oil) still gets us 30+ mpg on the highway. 33-34 mpg just cruising at 65 mph (speed limit here). Pretty impressive for such an engine. ;)

Cool -- very much looking forward to the oil analysis, as I am planning on switching to this oil next based on your recommendation --which, BTW, is consistent with the wear mean UOA data in the oil nerd's thread (it showed among the lowest wear!). Be interesting to compare your findings to those data as well.

It is indeed a thick oil for a 30 weight oil. It was definitely heavier than the 5w30 castrol syntec I used before. The UOA looked good, I needed a thicker oil for the 90+ degree heat down here in south Florida.

and how the heck did you manage 30+ mpg??

I'd recommend it as well. I'm on my second fill of that oil, I just got the UOA of the first fill. 4200 miles of 75% highway / 25% city and dozens of passes at the drag strip and it was looking pretty good.

http://i198.photobucket.com/albums/a.../th_E20154.png

It could be the altitude or the car might just be a factory freak. Computer reported 31.8 mpg average after a ~90 mile leisurely highway canyon trip the other day. That was also with about 10-15 city miles thrown in there. That and the low oil consumption both let me know this engine is healthy. ;)

Awesome on the oil analysis - ours should be really clean since the Z really doesn't see that much action being my wife's car. I think I can be confident leaving it in for 5000-6000 miles based on your usage and UOA.

If I live in Lakewood, WA which is located 45 minutes south of Seattle, would I be okay to run the 0w-30 Castrol Oil in my car? I' referring to the climate in my area. I did read the chart and the 0w-30 looked the best. Just curious what Nissan would say because they recommend the 5w-30. I just changed my oil at 1172 miles and I'm using the Ester Oil and the factory filter. Next oil change I will be using the PL 14610 and hopefully will have some good info on the oils. I'm liking the Castrol 0w-30 so far, just want to hear about the feed back.

Royal Purple Only!!!!

You'll be fine. It may be thick for a 30-weight, but it's not too thick to ensure proper operation of your valvetrain.

:shakes head:

Overpriced junk.

Royal Purple is the Best! nothing is better! you are confused

FWIW... I went with the recommended Ester Oil for my first oil change @ 3400 miles. Was it worth the extra $$? Only time will tell. I rather be safe than sorry come 100K miles.

wow is this thread still going?..haha

Yes it is! Royal Purple!!!!!!

:iagree:

fine its royal purple.. /thread.

Eh, you're not wasting my money on an inferior oil, so whatever. :rolleyes:

Where are u getting facts that show Royal Purple is junk out of curiosity? Would like to see these facts please post the link