As long as it is .3 or higher at idle and pegs at 3 when RPM goes up it’s fine.
Sent from my iPhone > On Mar 18, 2019, at 5:08 PM, OK Don via Mercedes <mercedes@okiebenz.com> > wrote: > > When the ambient temps are at and above 100F, a lighter than 50 weight oil > would not keep the oil pressure up at idle when the engine was fully warmed > up. 15W-50 synthetic was great in the OM61x and OM60x engines I had. So, if > the temps get high, you need heavier oil. If the temps get low, you need > lighter oil. If they swing to both extremes, you need multi-weight that > covers both ends. > > On Mon, Mar 18, 2019 at 4:44 PM Curt Raymond via Mercedes < > mercedes@okiebenz.com> wrote: > >> In a 61x engine 0w40 is hard to keep IN the engine. At least it was in my >> '83 240D. That car leaked 5x as bad with 0w40. It started more easily but >> was costing me an extra quart of oil a week to keep going. 5w40 leaked way >> less and started nearly as well. >> >> I'd say 5w40 is the sweet spot, especially for older engines that see some >> cold. At anything above freezing 15w50 is probably fine and provides higher >> sheer strength. I don't think its any "better" because engine oil is most >> of the time "good enough" and doesn't benefit from being "better". Most of >> us don't run in real extreme conditions... >> -Curt >> >> On Monday, March 18, 2019, 5:11:34 PM EDT, Meade Dillon via Mercedes < >> mercedes@okiebenz.com> wrote: >> >> I think ya'll are wrong with this idea that thicker oil is better. Vast >> majority of engine wear normally happens immediately after a cold start. >> Thick oil makes this worse. Synthetic oil has far better flow >> characteristics (see Curt's test of M1 vs. Dino in his freezer from years >> ago) and helps in this case. >> >> Oil is not only a lubricant but also plays a very important roll in cooling >> the engine internals, and for cooling you want a high flow rate. Thinner >> oil will flow faster, provide better cooling. >> >> 0W-40 is the best of both worlds, for diesel. I use 0W-30 in SWMBO's >> Infiniti gasser motor. That is at over 250k miles and doesn't burn a drop. >> >> See Bob is the Oil Guy website, read up on the Oil 101 info. >> ------------- >> Max >> Charleston SC >> _______________________________________ >> 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 >> >> > > -- > OK Don > > *“Travel is fatal to prejudice, bigotry and narrow-mindedness, and many of > our people need it sorely on these accounts.”* – Mark Twain > > "There are three kinds of men: The ones that learns by reading. The few who > learn by observation. The rest of them have to pee on the electric fence > for themselves." > > WILL ROGERS, *The Manly Wisdom of Will Rogers* > 2013 F150, 18 mpg > 2017 Subaru Legacy, 30 mpg > 1957 C182A, 12 mpg - but at 150 mph! > _______________________________________ > 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
