What is your CI with WCI? Have you obtained BTOG oil analysis?

Seriously though, as long as you change your oil at recommended change intervals it doesn't really mater much. You can waste hours researching this on the forums and you will find your self going in circles.

Lot's of people here use Redline. I was chugging Amsoil for years before the Z. Problem with that and any other oil that isn't sold off the shelf is that you have to change it yourself. I'm currently using M1 full synth and change out every 3.75K but I'm planning on switching to Pennzoil Ultra. Oil analysis is great and I can find local service that offers it. I figure if it's good enough for Ferrari then it's good enough for the Z.

Mobil 1 or Castrol EDGE usu does the trick for me! ;)

:shakes head: Newbie did not search.

I-B-T-L

:icon18:

Oh shyyt. I been wastin' money... I'm switchin' today... :icon18:

Redline 5w-30, full syn esther base, been running it for 40k, very successful, zero oil burn, no valvetrain noise.

Use some VTECH SUPER OIL.

"Oils Ain't Oils"
 

Time for another oil thread.

So I've faithfully Redline oiled everything in my car from the engine oil (with purolator pure1 filter, of course), tranny, and diff since 3k miles based on the recommendation of this forum. About 40k miles later and the car is running fine. I did my own hw on redline and found how it's a group 5 oil and has the ester that Nissan recommends. I've kept using it based on the faith of other users on this forum and on the peace of mind that I'm giving the z the best stuff.

But.. Some engine oil wear tests show redline isn't so great. One shows mobil1 being better, one shows mobil1 being better than royal purple. One shows royal purple being better than both mobil1 and redline, in which this is displayed in this PDF: http://www.animegame.com/cars/Oil%20Tests.pdf

So what do you guys think?

I think that within any given API service classification, oil is oil.

I tend to agree. Stick to the recommended oils and you will be fine. I have read bad things about Royal Purple, so I avoid that brand, but Redline, Pennzoil Plat, Mobil 1. All good stuff. I ran Pennzoil Plat in my '09. Now I am using M1 0w-40 Euro. I saw lots of positive remarks and good UOAs for this oil.

1. Anything entitled "x aint y" is as likely to as scientifically grounded and rigorous as a cake recipe.

2. The bearing wear tests they use reveal little about internal engine component wear. Slap some heavy bearing grease on those things and they will survive the tests longer -- your engine, not so much.

3. Multiple independent UOA's on the same (or highly similar) engine, run under the same or highly similar conditions will give you better data on their performance characteristics.

4. At the end of the day, notwithstanding "snake oils" like Slick 50 (which makes use of small particles that have been found to actually accelerate engine wear...), most ASE oils will provide about equal protection, with variance mainly cropping up in regard to high power, long term application -- as in endurance racing, not daily driving, or in data on whether engines hold together for 200 K miles vs, say, 400 K miles, and also data on recommended OCI's, which large scale studies by the state of CA for fleet vehicles has shown to be about double what is typically recommended (the ol' 3500 mile rule-of-thumb) when synthetic over dino oil is used.

5. Do not make decisions on the veracity of claims on faith if they can be meaningfully and logically empirically investigated -- save that kind of speculation for whether or not to leave out cookies for Santa Claus -- make them based on your best assessment of the logic of the testing and merits of the gathered and analyzed data. These methods and data are not relevant to selecting engine oil -- period.

When you change your oil, send your used redline oil to blackstone for analysis. Change it to Mobil 1, then when you change again (after similar mileage/use pattern), send that oil to blackstone for analysis. Change to Royal purple, rinse, repeat.

:iagree:

Oil for all intents and purposes...Oil is oil. Don't listen to marketing listen to engineering. Marketing is gonna throw all these different numbers on wear stats at you for the sole purpose of confusion. Then 100k miles later you realize oh my engine is still running and I've been spending 80 bucks per oil change meanwhile the guy using mobile 1 ep down the road spending 30 bucks a change. His car is still running too. Wtf.