I'm no expert on UOA's but IMO that's either an excellent engine or an excellent oil....probably both...
I guess the moly is from the BG additive?
Yes, it appears to be from the BG additive: although the calcium value seems a bit low for it, would of been nice to see this sample be the oil change he added it to, instead of the time he skipped it.
From the report, your friend can go further on the OCI. How much further? IDK!
The OCI from the manufactures calls for 10,000 miles, not 100% sure if the verbiage in the owners manual calls for less under severe usage that this truck sees (I'm sure it does), I would have to look it up, but knowing him, he's not going to extend the drain interval based on the data provided.
One of the reasons I bought a 5.7 Tundra
Toyota quality no doubt, my parents having had a few trucks from the domestic side of the competition, after purchasing a 15 Tundra 1794 edition that they have nothing but good things to praise about, have said they won't go back.
So much for the theory that thin oils=heavy engine wear!! This one throws that theory right out the window! Of course, it is Castrol Magnatec, so that's a (good) factor as well. I wish AZ & AAP would give away the 5W30 Magnatec like they did the 5W20 & 0W20-I would use it in EVERYTHING gasoline powered!
I concur, I had mentioned to him in the past, that he may want to consider not using the 0w-20 oil, and switch to a more stout oil of higher viscosity for the towing he planned on doing. What he's towing now is a upgrade from a travel trailer he had before, he wanted something bigger, an RV layout only a 5th wheel could offer, along with a more stable towing experience compared to it's travel trailer counterpart, so when that happened, I had also mentioned to him he may want to consider buying a bigger truck, a diesel one specifically from the big 3, to have something more suited for the job of towing assuming the Tundra wasn't capable of it. Well when he sent me this sample, it was one of those " insert foot in mouth" scenarios, I couldn't of been more wrong in my statements to him.
Some additional information for those interested that I didn't mention, first off this isn't a one use case scenario towing once in a blue moon type thing, hes been towing from day one with it 2-3 times a year with it. He's done a few modifications to both the trailer, and the truck to have a better towing experience most of which are braking upgrades, none of which skew the numbers on the engine oil sample fyi.
The 5th wheel trailer (Chaparral 370FL) has upgraded disc brakes on both axles from the drum brakes it originally had.
Tundra has upgraded rotors & brake pads, and rear air ride suspension (with a PSI gauge built into the center console with a toggle switch to adjust on the fly) to accommodate the extra weight.
Now, the engine holding up is one thing, as far as the transmission holding up longevity wise is another topic up for debate, but in regards to that; I would have to ask him, but I'm certain it was replaced at 30,000 miles with BG Premium Full Synthetic ATF, along with BG ATC Plus Automatic transmission Conditioner additives at the time of replacement. Hes also got a ScanGauge II that he uses to monitor transmission temperature when towing, when towing up steep grades says that transmission temp stays at the 200F mark out of overdrive & Tow/Haul mode, and has no issues towing while maintaining a decent speed even up grades.
A picture is worth a thousand words they say, so here it is, and well for any doubters.