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Old 11-04-2013, 10:23 PM
kerry kerry is offline
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Join Date: Jan 2002
Posts: 18,355
Over on a 6.5 GM forum there is apparently a long thread with comparative tests of various lubricity additives. I haven't waded thru it myself but I'm pretty sure the conclusion was that there's nothing better than 2 cycle oil. I use it in my 6.5 but don't use it in my TD.
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1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13
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