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At 0.79% and C2, it is a low SAPS oil. JLR specs a 20,000 mile OCI
As an overly simple summary
- A3/B4 is high SAPS and high HTHS
- A5/B5 is high SAPS and low HTHS
- C3 is mid SAPS and high HTHS
- C2 is mid SAPS and low HTHS
- C4 is low SAPS and high HTHS
- C1 is low SAPS and low HTHS
Where the HTHS is from the base oil viscosity thickness (&VII package) and the SAPS is from the metallic addative package (SA%).
I'm using the ACEA definitions of mid-SAPS (< 0.8%) and low-SAPS (< 0.5 %) here.
If you can't find the right oil, my view is that it is OK to go up in HTHS as this is what protects the engine from wear by keeping the metal surfaces apart. This only cost of going up in HTHS is maybe a very minor increase in fuel consumption. With SAPS level, too high can badly affect the DPF in a diesel or to a lesser degree the cats in a gas (petrol) exhaust system.
So if I couldn't find a good C2 oil, I would happily use a C3 oil in my car. That is going up in HTHS (protection) but keeping the SAPS levels the same. The slight increase in viscosity would be less than the viscosity difference you would see between starting your car in summer Vs winter, shouldn't be a problem.
Now it just so happens that in my opinion the GM Dexos2 (for GM diesels & some high performance gas engines, not to be confused with Dexos1-Gen2 for gas/petrol only), the GM Dexos2 is so close to a C3 oil that I never saw the point of GM even developing Dexos2 they should just have said C3 and been done with it. But I think they wanted their own GM Dex branding.
Anyway if I had a Jag that needed a top-up in the middle of no-where. And all they had was ILSAC GF-5 & Dexos1 oil OR Dexos2 oil, then I would grab the Dexos2 without concerns, use it and sleep well at night.
BTW every Dexos2 oil I have ever seen in Australia is also a C3 oil.
BTW M1 5W30 ESP has the following specs:
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Specifications and approvals
Mobil 1 ESP Formula 5W-30 has the following builder approvals:
BMW Longlife 04
MB-Approval 229.31
MB-Approval 229.51
Volkswagen (Gasoline/Diesel) 504 00/507 00
Porsche C30
Chrysler MS-11106
Peugeot/Citroën Automobiles B71 2290/B71 2297
GM dexos 2
Mobil 1 ESP Formula 5W-30 meets or exceeds the requirements of:
ACEA C2, C3
API (Meets Engine Test Requirements) SM/SN
JASO DL-1
According to ExxonMobil, Mobil 1 Formula ESP 5W-30 is of the following quality level:
API CF
Volkswagen (Gasoline) 502 00/503 00/503 01
Volkswagen (Diesel) 505 00/506 00
Technical details
SAE Grade 5W-30
Viscosity, cSt (ASTM D445)
@ 40ºC 72.8
@ 100ºC 12.1
Viscosity Index 164
Sulphated Ash, wt% (ASTM D874) 0.6
HTHS Viscosity, mPa•s @ 150ºC (ASTM D4683) 3.58
Pour Point, ºC (ASTM D97) -45
Flash Point, ºC (ASTM D92) 254
This oil XOM says is suitable for both C2 and C3 applications (it's actually a C3 oil). The SAPS level is on the lower side, but if you kept the OCI to 10,000 miles you should be OK.