M1 0W-40, 21+ months, 20,017 miles, '90 Saab 900

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Eiron,

Delvac 1 is the best product Mobil makes, hands down, with the possible exception of their much more expensive Motorcycle oils. D1 may not last as long as the 0w-40 in some applications,but it will generate much lower wear rates and less oil consumption.

TS
 
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