You mean 15cst @100 deg C re ASTM D445?5w40 C3 high visco (15cst). It's H2 + C3.
What is the GH2 minimum spec visc at 100 deg?Yes.
H2 is M2 5w40 A3/B4 for high performance engines (high visco too).
How does the GH2 differ from S2, T2 and Z2?Not public, it's part of Petronas-FCA contract. Anyway any stable w40 will work same or better.
A little confused. If GH2 = H2 + C3, how can it be both A3/B4 and C3 and still be mid-SAPS?5w40 C3 high visco (15cst). It's H2 + C3.
Ok thanks for the clarification. One other question. One of the approved oils for my car is Selenia Quadrifoglio, which is GH2 and C3. The safety sheet for this oil shows 70% of it as not classified oils. I assume that means it’s proprietary but do you know if this is a Group III oil?I mean GH2 is like H2 but C3.
Another oil that looks ok for my car is Motul 8100 X-Clean 5W40. It’s C3 and shows S2, T2 and GH2. Strangely, the updated version X-Clean Gen2 5W40 shows only S2 and T2 but no GH2. What’s the implication?yes grpIII oil
Mainly seems G-III yes, but it has special flash point and good pour point, so seems it has any extra neutral base oil (Etro+ from Petronas or C15-50 from Mobil/Neste) or little PAO.Ok thanks for the clarification. One other question. One of the approved oils for my car is Selenia Quadrifoglio, which is GH2 and C3. The safety sheet for this oil shows 70% of it as not classified oils. I assume that means it’s proprietary but do you know if this is a Group III oil?
Ok, that is re my GIII comment. What’s your response to my Motul comments?Mainly seems G-III yes, but it has special flash point and good pour point, so seems it has any extra neutral base oil (Etro+ from Petronas or C15-50 from Mobil/Neste) or little PAO.
Thanks. Among these three GH2/C3 5W-40 oils, is there a best one overall: Selenia Quadrifoglio, Motul 8100 X-Clean, Ravenol VMO?X-Clean gen2 lost A40 and GH2. It has different bases chemistry, incredible VI, HTHS and cold performance but change hot visco and flash point, may be the reason.
Thank you very much for all this information. You are obviously extremely knowledgeable on the subject. I just have one more (I hope) question. I noticed on the tech data sheet for Ravenol VST, which is a A3/B4 oil, it states recommendation for Fiat 9.55535-GH2, which is spec’d as a C3 oil. Is it possible that it can be both A3 and C3?X-Clean and VMO use same additive pkg from Shell, both mainly G.III, I'd use cheaper.
Quadrifoglio seems Lubrizol pkg and little secret there until analized, it's Sport Power sucessor, should be like others or little better.
Other good options, GH2 apart, are Aral High Tronic, Havoline Ultra S, Motul Specific 50501, Neste Pro C3, Selenia K Pure Energy, old Selenia Sport Power, Total Ineo, Valvoline Synpower MST and Redline Euro and Ravenol RUP as TOP option.