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Old 12-07-2014, 09:39 PM   #25
Nomad Willy
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City: Concrete Washington State
Vessel Name: Willy
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Join Date: Oct 2007
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I can think of a case where you might want to use Delo over Shell or Shell over Delo.

30wt oil is not 30wt oil. It may be 26wt or 34wt oil. Shell rates it as 30wt but in reality may be too viscous to rate as 20wt or too "thin" or nonviscous to rate as 40wt so it's labeled 30wt.

Now if I knew Shell was 27wt and Delo was 33wt I'd know which one to buy but they both are rated 30wt.
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