Mobil redesigned the bottles for the 0w-30 and 0w-20.
http://www.mobiloil.com/USA-English/MotorOil/Oils/Mobil_1_0W-30.aspx
I like the 0w-30 specs. HT/HS of only 2.99 (better fuel economy the lower the HT/HS) and yet it still meets the Corvette spec. Depending on the application this could be a good thing.
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How do Mobil 1 0W-20 Advanced Fuel Economy and Mobil 1 0W-30 Advanced Fuel Economy differ from the products manufactured prior to 2008?
They are the same formulation as the products marketed prior to 2008. As the importance of fuel economy has increased, we felt it was important to communicate to consumers regarding the products in our line that offer the best fuel economy.
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What type of fuel economy and savings should I expect from using the Mobil 1 Advanced Fuel Economy products?
Fuel economy improvement is dependent on many variables including vehicle/engine type, outside temperature, driving conditions and your current engine oil viscosity. Mobil 1 0W-20 Advanced Fuel Economy and Mobil 1 0W-30 Advanced Fuel Economy deliver a potential 2% fuel economy improvement as compared to those viscosity grades most commonly used. As an example of the fuel savings you may experience over the life of your vehicle, see the chart below:
Fuel Savings Worksheet
Cumulative Miles 50,000 100,000 150,000
Estimated Savings* $147 $294 $441
*Based on 20 MPG, $3/gal gasoline and a potential 2% fuel economy improvement (based on a comparison versus those grades most commonly used). Actual savings are dependent upon vehicle/engine type, outside temperature, driving conditions and your current engine oil viscosity.
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What if I don't notice improved fuel economy after switching to Mobil 1 0W-20 Advanced Fuel Economy or Mobil 1 0W-30 Advanced Fuel Economy?
Your fuel economy improvement will be dependent on your vehicle/engine type, outside temperature, driving conditions and our current engine oil viscosity.