You should try the Mobil 1 FAQ Site at
or http://tinyurl.com/ygls6rk .
If you follow the product links you can find the Mobil 1 suggeted life
for their products.
Mobil 1 Extended Performance 5W30 says the following: "Provides
outstanding engine protection at oil change intervals of up to 15,000
miles or 1 year, whichever comes first." (from
The "Standard" Mobil 1 product data sheet doesn't include a life
). The FAQ at
explains the difference between standard Mobil 1 and Mobil 1 Extended
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