TD was quite helpful to me. thankfully so, since he cost a lot more. But I never felt I got the “keys” to the tribology knowledge universe, only a carefully guarded glimpse through the keyhole… nor should I have, I suppose.
my big unanswered questions revolve around how to protect my oil-thrashing Ford EcoBoost at a lower price point than his favorite $75/gal oil (Cummins / Valvoline Premium Blue RESTORE). So far, I don’t have a totally satisfying answer. And it appears I won’t have him to ask from here on out.
Despite me asking, he would never suggest nor agree that Euro spec oils were the answer, nor that higher HTHS was a good thing, nor suggest a xw40 oil, nor that any oils widely available at Walmart, NAPA, AZ, etc were really worthy, nor did Castrol ever get a mention by him. It seemed Amsoil SS was at the bottom of his short list, if I wanted an OCI of 8k-9k miles. He did “stoop” to suggesting RGT and QSFS once for a short “off-season“ OCI (I wasn’t all that impressed with the 5w30 USA QSFS, though it didn’t fail miserably…but I only used it for 3k…which appeared to be near its limit in my case), and he briefly talked about Mobil ESP as “promising,” but later stopped talking about it.
it did take me too long for it to sink in that fuel dilution was not the oil’s fault, though even with his help I could never predict what oils (besides the VPBR) would stand up to it well in my engine. But now it’s formula changed. Haven’t tried the gen2 version. next summer, I’ll try Amsoil SS 5w30, but worried it’s too thin. hope it stands up to the fuel, stays in grade. I may have to sample it mid summer.
next winter, I might try the euro QSFS 5w40, since it will be a 30 grade before it’s drained...and winter is my “off-season” for travel.