Disappearing Coolant

[Wiseman]

(04-16-2016 )DrivingZiggy Wrote:  Well, got the bad news this evening. I guess it was pretty alarming, because Ben at OPS called me to let me know that my oil had plenty of sodium and potassium in it. So I guess I'll be replacing the EGR cooler and the oil.

Speaking of oil, I've been running Delvac 1 5w40. Since I'm going to replace it, should I go with Delvac 1 5w30? Whatchathank?

Well ...that's alarming for sure . I really don't have a lot of faith in this oil analysis out there , but hey, do we have anything better in our disposal?
Now the Mobil 1 question. I've never been fan of synthetic oil . Why ? Because I've never been a fan of extended oil change intervals (main purpose of synthetic in normally used engine) . Temperature stability and brake point superiority of synthetics doesn't apply if engine isn't abused (race engine for example). Soot is soot . It doesn't disappear magically into the oil , it doesn't matter detergents or what ever is added into. To me always is been good conventional oil with highest possible amount of zinc, good filtration and oil change between 12k-15k ml . So far my cm870 is "black belt" with 1.1 million miles and performs as new if not better (currently "grounded". I refuse to haul cheap loads ). The first digits are in relation to ambient temperature at cold start. So choose the right number according to whatever is the average temperature and that's it . Once engine get to normal operating temperature and everything function normally enjoy the ride and monitor your gauges. Engines like to be pampered and pushed ! NOT ABUSED ! What I mean is : warm it up at least to 160-165 *F and drive easy till gets where it should be , then you can push it to the limit. Before shutting it down let the oil temperature go below 198*F . By then turbo and exhaust manifold will be sufficiently cool for shutdown.