Oil topics are sooooooooo subjective!!! my .02 Pick a Good oil brand and don't 2nd guess! I've used Shell Rotella T6, & Mobile 1 in my TDI's and Mercedes with absolutely ZERO issues 300K plus miles on multi cars!!

The only car I've experianced motor failure was a 1992 Camry(blew hole in side of motor from clogged oil passages) and that was due to my nephew NOT changing the oil!!!

Good rule of thunb: Change oil & Filter. AND change it often!!

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2006 Jetta TDI DSG 320k miles
1997 Ford F150 325k miles 4.2L V6 "Work Truck"
2008 Tundra 225k miles 5.7L
1982 240D.....sold
1984 300D...Totaled OUCH!
1985 300D Turbo 222k miles "Dos" sold to 79Mercy
1986 300SDL 98K miles "The Beater"....sold
1987 190E 2.3 16v Euro spec 115K miles....sold