Originally Posted by Mainia
Originally Posted by Gokhan
Korean oil recommendations are a mess.
All they mean by A5/B5 is a synthetic oil with HTHS ~ 3.0 cP. In US this translates into a GM dexos1 Gen 2/Gen 3 5W-30.
You can also run a high-HTHS oil (HTHS ⥠3.5 cP), but make sure it's mid-SAPS, meaning ACEA C3 or GM dexos2; otherwise, full-SAPS oils like ACEA A3/B4 will increase the rate of the accumulation of the intake-valve deposits in your GDI/TGDI engine. SAPS means sulphated ash, phosphorus, and sulfur, and you ideally need to keep the SA at or below 0.8%.
Isn't Mobil 1 ESP 5w-30 a low SAPS? The old formula had 0.6% ash, but the newer formula has 0.8% ash.
https://www.mobil.com/en/lubricants/for-personal-vehicles/our-products/products/mobil-1-esp-5w-30/
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These are the ACEA SAPS definitions for PCMO (gas and light diesel, the A/B, C, and upcoming G categories):
Low-SAPS: SA ⤠0.5%
Mid-SAPS: 0.6% ⤠SA ⤠0.8%
Full-SAPS: 1.0% ⤠SA ⤠1.6%
I guess oils with 0.9% SAPS fall in between mid-SAPS and full-SAPS.
Low-SAPS oils are virtually nonexistent as there are only one or two engines that specify them (some Peugeot or Opel diesel engine?), and those specs may go away soon because they're not worth the trouble.