Recent content by Gokhan

  1. Gokhan

    CAFE and the USE of Lower Viscosity Motor Oils

    No, they are virtually all German cars, which use thick (HTHS ≥ 3.5 cP) oil. Nevertheless, it has nothing to do with the oil. https://www.consumerreports.org/cro/magazine/2015/06/excessive-oil-consumption/
  2. Gokhan

    CAFE and the USE of Lower Viscosity Motor Oils

    California and Europe are very serious about it. Other states in the US? Probably not as fast. https://www.nytimes.com/2021/02/17/business/ford-says-it-will-phase-out-gasoline-powered-vehicles-in-europe.html
  3. Gokhan

    CAFE and the USE of Lower Viscosity Motor Oils

    I am skeptical and, to be honest, terrified of full self-driving, but certainly, something like that could eliminate for most people the need to own a car. It would be like the Bird scooter of the future.
  4. Gokhan

    CAFE and the USE of Lower Viscosity Motor Oils

    The problem with keeping a car for a very long time is not engine longevity but safety. For a long time, I drove a 34-year-old-car, and now, I'm getting a new one every year. It makes a huge difference in terms of safety when you have a latest model with all the advanced electronic safety...
  5. Gokhan

    Cell phone technology

    CDMA lacked worldwide compatibility but had more capacity than GSM, albeit it didn't allow simultaneous voice and data and had worse call quality and more call drops. However, it's not just Verizon, and it's not just CDMA and GSM. 2G, 3G, and 3.5G are being turned off by all mobile network...
  6. Gokhan

    Pennzoil Platinum and Ultra Platinum NOACK values

    You are new here, and you would think this would be known to people who have been on BITOG for long, but I bet 90% wouldn't be able to answer correctly why a 10W-30 version of an oil has a lower Noack volatility than its 5W-30 version! Even less known to almost everybody is that the 10W-30...
  7. Gokhan

    Pennzoil Platinum and Ultra Platinum NOACK values

    It's not a small step-up in "thickness." You need to look at the base-oil viscosity, not the blended-oil viscosity, the latter of which is modified by the viscosity-index improver (VII). Even though the KV100 and HTHS numbers for the 5W-30 and 10W-30 versions may be nearly identical, there is a...
  8. Gokhan

    Pennzoil Platinum and Ultra Platinum NOACK values

    Yes, a good synthetic 10W-30 can be made with little VII. High-quality oils 0W-40 such as Mobil 1 FS 0W-40 and Castrol 0W-40 are made of top-of-the-line base stocks, and their VII content is not much higher than that of a mediocre synthetic 5W-30. See my my VII/HTFS (base-oil viscosity) calculator.
  9. Gokhan

    Pennzoil Platinum and Ultra Platinum NOACK values

    That Noack = 8.9% number for Castrol Magnatec 5W-30 was for the SN PLUS version, which had an unusually thick base oil (a synthetic base oil with a high CCS = 6010 cP), which was the reason behind the lower Noack. Castrol Magnatec 5W-30 SP should have a Noack ~ 13% according to my calculation in...
  10. Gokhan

    Pennzoil Platinum and Ultra Platinum NOACK values

    Here is a brief lesson on motor oil. 1. When the formulation of an oil changes (such as from SN PLUS to SP), the Noack will change. This is because the Noack primarily depends on two things: (1) base-oil viscosity and (2) base-oil quality. When the formulation changes, the blender will usually...
  11. Gokhan

    Pennzoil Platinum and Ultra Platinum NOACK values

    Castrol Magnatec with its low-end Group III base oil doesn't even have a low Noack. The current formulation is probably at around 12%. He saw an old PDS somewhere that doesn't apply to the current formulation. You need to measure the oil consumption over a full OCI to have a meaningful comparison.
  12. Gokhan

    Pennzoil Platinum and Ultra Platinum NOACK values

    You can find out if it's due to evaporation by comparing the oil consumption for a low-Noack oil vs. for a high-Noack oil.
  13. Gokhan

    Pennzoil Platinum and Ultra Platinum NOACK values

    I made that statement according to what is known about the oil-consumption issue in the 2AZ-FE engine, which is reported to be caused by clogged piston-ring oil-return holes, subsequently leading to coked and worn piston rings.
  14. Gokhan

    Nissan introduces engine with 50% thermal efficiency

    This is great! I need to watch the whole YouTube video when I get a chance. I love the way the Japanese nod when they are introduced. It's funny though they are dubbed with female voiceovers. 50% thermal efficiency is great, and they have certainly put a lot of effort into this, and it is...
  15. Gokhan

    Is WM the cheapest for PP 5w-30 D1G2?

    @OZHSV, you may want to try this international shipping service. https://myus.com/
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