Hello!

I am new to this forum and wanted to say something about myself. I am 19 go to school at Indiana University of Pennsylvania. My father and I own the following MBs
1971 280SEL - green
1976 280S - white
1976 280C - mellon
1979 240D - cream
1982 300D - marron
1983 300TD (1) - gold
1983 300TD (2) - cream

Anyway, we both love our MBs, and the cream 300TD is my daily driver.
Winter is starting to show its face in western PA, and I was wondering if there is a better "winter" oil for it, I have always run Rotella (sp?) T 15w-40, and it just seems like it turns over slower now that its cold, i have 900 CCA battery (new) and all the cables are good. Would moblie 1 or another synthtic oil be good??? and what grade too???? Another question.......My kick down swtich has stopped working all together now, it used to work in high gear only, but now its not kicking down at all.....whats going on???