Agree with the Denso statement with one exception. Oil filters. Its not Denso's construction or design, its the efficiency and capacity. Average. I run full syn extended OCI's, have tried many filters including Denso. The difference between average and high efficiency on extended OCI's is very noticeable to the eye. When I use a 95 or a 97% @20u efficiency filter, the oil is pretty dark by 5k. When I use a 99% @20u efficiency filter, the oil stays pretty clean all the way to 10k. Doesnt seem like much of a difference in efficiency on paper, but for both engines in my sig it is. 99%@ 20u gets most visible contaminants.
Denso does not publish oil filter efficiency or capacity but there have been tests performed on the net. The claim by Amsoil is 51% @ 20u. Seems low to me but they also list MC and the efficiency is close to the known efficiency which adds some accuracy to Amsoil's report.
So if 99% is trapping more "dirt" for longer periods, it will need more capacity or it could clog and bypass on an extended OCI. Thats rare but has happened to me in the past. If its newer than 02, your LS400 is vvt-i. Fast oil flow at startup is critical to vvt-i. If not, you get that nasty cold start 3 second controller rattle people complain about. So IMO high "dirt" trapping capacity using a high efficiency filter on an extended OCI is more important with Toyota vvt-i to prevent a lag in oil flow.
There are several filters with high efficiency, high capacity good for extended OCI's. I use the Fram Ultra on both engines right now. Besides the 99% efficiency and and 28g (? may be more) capacity, its the cheapest in this group, sold at walmart where i buy the oil $8.97. No extra trip for a filter. The m1 and other suggestions in this group are good too.
There are people on here that claim the 99.9% Purolator PureOne can be used for extended intervals, but IMO that depends on the driving conditions and current engine cleanliness. Its a standard resin coated cellulose media, so its capacity is limited. With such a high efficiency, clogging would be a concern (to me on a vvt-i) at 10k intervals.
Will using a lesser efficiency filter wreck the engine? No, but I have a history with Toyota engines and a common source of problems is engine deposits. It effects them more than others. So I'm more picky with oil and filters. It would seem Toyota thinks that too, they've switched over to syn only in the new engine designs.