Castrol Syntec or Mobil1
My rig's PO used Syntec 5w50 religiously so I stuck with it. O'Relly's hasn't had a sale on Syntec for a while, it's now at around $9 a qt. They do, however, have Mobil1 15w50 on sale til the end of Oct. for $6 a qt, well, all the Mobil1 varieties on sale. Hard to imagine I could go wrong. Thoughts?
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1986 300SDL, 362K
1984 300D, 138K
Last edited by cmac2012; 10-09-2013 at 02:55 PM.
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