I have been using non synthetic Delo 400 in the 300sd but I have been showing high bearing wear so I was gong to try Rotella T6 but maybe I can give this a try.

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1984 300SD Orient Red/ Palomino
1989 560SEC
2016 Mazda 6 6 speed manual
1995 Ford F-150 reg cab 4.9 5speed manual