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Discussion Starter · #1 ·
Four oil changes so far on our year old '07 6.0, in an E450, rv-about 12,000 miles. First change was not tested, the original factory fill, second change, tested, was Ford 15-40 dino, second change, tested was Amsoil 15-40 synthetic, third change, tested, was Del 1.

Across the board the wear metals are very close, the lab language is, "similar wear characteristics, very low wear levels".

Its -beginning- to look like it doesn't make a hoot what juice you use so long as you change often; I think................

Oh yeah,

no glycol !!!!!!!!!!!!!!!!!!!!!!!:woot:
 

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Discussion Starter · #7 ·
Both Delvac 1 (also Mobil 1 Turbo Diesel Truck, exact same stuff, this according to Mobil themselves) and Amsoil 14-40 Heavy Duty Diesel and Marine) EXCEED CJ4 and CI 4 plus.
 
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