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Now what do I do?

I use 5w40 Rotella Synthetic in my 6.0 and change it every 5,000 miles.
 

DNFXDLI

The Token Canadian
Staff member
Been running Amsoil for years in all kinds of vehicles as have many,many people I know. Never had a problem.
 

mrxlh

Oilfield Trash
5,904
430
Stigler, OK
Chevron Delo 15W40 is the best oil money can buy. By a Federal Judge ruling it is synthetic, although it is not marketed as such. Nothing wrong with Scamsoil, it just cots way more than it should.
 

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