2012s on lots....where are the oil coolers?

wstar

We all get science, none of us are morons here, and quite a few of us have engineering and scientific backgrounds. The reason he's getting miffed is because you're out here touting your credentials as giving you some magic understanding that mere mortals cannot hope to achieve about this subject.

If there's a reason that running Nissan's specific ester oil blend is better for the friction properties of the VVEL heads than other quality synthetic ester-blend lubricants, we'd love to hear about it. Nissan's basic science work that we've seen in the PDFs combined with available data from oil mfgs don't even begin to answer that question in a rigorous manner, in either direction. Empirically though, nobody's gone and shown a dyno power dropoff from switching off of Nissan Ester either.

To expound on the science part: what they show in the paper is that (a) their nifty H-free DLC does better than two other types of surface material regardless of the oil type used (b) their PAO + ester blend does better than regular oil regardless of the surface type, and (c) (DUH) the best results in the test come from combining the two best-tested: their PAO + ester and their H-free DLC.

What the paper does not at all address for our pragmatic needs: (1) Is their PAO + 1% glycerol mono-oleate the *only* variety of engine lubricant that can reach frictions levels this low or lower in combination with their H-free DLC? (2) More specifically, was it really exactly 1% glycerol mono-oleate that works, or do other percentages of other similar esters work? (3) Is glycerol mono-oleate, or another equal-performing ester in tests with H-free DLC, a commonly used ester in ester-blended oils from other manufacturers?

You get the idea. Unless Nissan and/or other oil manufacturers want to take their science (and engineering) reporting to the next level and answer the Practical Questions That Matter To Us, we have to rely on empirical data from running these engines in the real world with various oils, which so far does not fall in favor of Nissan Ester Oil.

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