Proponents of the dexos license say it will simplify oil selection. The term "synthetic" regarding motor oil in the US is very ambiguous. It was supposed to help those that do not understand viscosity, but now is coming out in multiple viscosity offerings.
This oil was recommended to me buy my GM mechanic... I just bought a new GMC sierra and didn't have any idea what Dexos 1 was, after doing some research i discovered that this is a very synthetic blend...
Product Features... against viscosity breakdown for long oil life and drain intervals ...
Keep your vehicle running smoothly and increase performance with Pennzoil Platinum 5W-30 Full Synthetic Motor Oil. It is a high-quality product that exceeds the US, European Industry and OEM standards.
In mid-2011, Police Fleet Manager ran a series of articles on semi-synthetic and full synthetic motor oil. The advantages in police work are clear. Synthetic oil offers better engine protection during a cold start, when 60 percent of engine wear takes place.
Not sure what the difference would be. My understanding is that this is a bit more important with the Cruze since the turbo is cooled by the engine oil, and Dexos1 approved oil has the needed detergents to ensure that oil does not get deposited there and start causing problems.
Again, the Dexos1 certification is a fee per gallon of oil. Meeting the specification is an entirely different thing. AMSOIL as well as many other oil companies have chosen not to pay GM for this.
dexos 1 ™ LONG LIFE SYNTHETIC 5W-30 (2nd Generation) SN – ILSAC GF5 PART NUMBER: 1 Litre 19350776 5 Litre 19350777 20 Litre 19350778 205 Litre 19350779 PREMIUM SYNTHETIC MOTOR OIL FOR PETROL ENGINES
Having your oil and oil filter changed at least as often as recommended by the manufacturer is likely to generate the single biggest return on your investment in routine auto service and maintenance.
Here is the complete list of best motor oils ranked by PSI strength. The higher the PSI strength the better the oil is at preventing wear. Oils within 10% of each other can be considered approximately equivalent.