Gokhan
Thread starter
Fully agreed, Solarent. It's the final blended oil that matters. Individual ingredients don't necessarily indicate the final performance, as how they interact together is more important.
Equally importantly, an oil that works for one engine may not work for another. In my case I had good results with PP 5W-30, OK results with Delvac 15W-40, OK but not-so-good results with PYB 5W-20. TGMO 0W-20 SN seems to be giving great results in my application so far. I'll report on the long-term MPG and post UOAs as well in the coming months.
We can't also dismiss the benefits of synthetics solely on the fact that mineral oils also pass the same GF-5 tests. Nevertheless, this is only so because that's how the tests are planned beforehand -- if they had made the test criteria stricter, mineral oils would fail in many areas while quality synthetics would still pass. Synthetics last longer and perform more uniformly throughout the OCI and should be beneficial in many areas.
Equally importantly, an oil that works for one engine may not work for another. In my case I had good results with PP 5W-30, OK results with Delvac 15W-40, OK but not-so-good results with PYB 5W-20. TGMO 0W-20 SN seems to be giving great results in my application so far. I'll report on the long-term MPG and post UOAs as well in the coming months.
We can't also dismiss the benefits of synthetics solely on the fact that mineral oils also pass the same GF-5 tests. Nevertheless, this is only so because that's how the tests are planned beforehand -- if they had made the test criteria stricter, mineral oils would fail in many areas while quality synthetics would still pass. Synthetics last longer and perform more uniformly throughout the OCI and should be beneficial in many areas.