5w30 is about 12cSt at 100C. 15W50 is 18 cSt. 5W40 is 14.5 cSt. The only difference I'd expect to see is that the 15W50 will peg the oil gauge at idle in slightly worn engines. One thing to consider is the loss of certain valve and rocker protecting additives with oils formulated for modern engines. The 15W50 has more phosphorus and zinc in it than any of the other non racing / non motorcycle formulas of M1. https://mobiloil.com/en/motor-oils/mobil-1/mobil-1
> On August 5, 2019 at 9:08 PM Dwight Giles via Mercedes > <mercedes@okiebenz.com> wrote: > > > I used 15w50 in my 240D & 300D 2.5t when i was using them for hard > commuting. Is the15w50 too high a viscosity for the around town driving i > do with the CD now that it has antique plates & little driving? > > Dwight Giles Jr. > Wickford RI > > On Mon, Aug 5, 2019, 7:18 PM fmiser via Mercedes <mercedes@okiebenz.com> > wrote: > > > > Dwight wrote: > > > > > Ok Craig here goes. What weight M1 do I want to put in my 0M617 > > > 300CD? I don't drive it in the winter & only about 1k in season. > > > When i was driving it regularly, i used 5w40 but i think that > > > is NLA. > > > > I would use 15W50. It is hard to find around here, so for a > > number of years now I have been using Traveler (Tractor Supply > > house brand) 15W40 bought in 5 gallon buckets. Seems to be a > > decent oil, and relatively low cost, so I just change it more > > often than if it was "real" synthetic. > > > > _______________________________________ > > http://www.okiebenz.com > > > > To search list archives http://www.okiebenz.com/archive/ > > > > To Unsubscribe or change delivery options go to: > > http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > > > > > _______________________________________ > http://www.okiebenz.com > > To search list archives http://www.okiebenz.com/archive/ > > To Unsubscribe or change delivery options go to: > http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > _______________________________________ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
