Considering trying this new oil out on my "fleet" (3 family cars, 2004 Toyota Kluger, 2004 Toyota Ist, 2008 Lexus IS350), I currently run them on Penrite HPR 5 5W-40 which is excellent, and I have another 15L in stock so won't need to buy oil for another year at least... but when I did the timing belt on the Kluger's 1MZ-FE it has varnish under the valve cover, so

and the Lexus puffed a bit of smoke on startup after sitting for a week the other day, and the Ist sounds like it's pinging a bit when it lugs up hills sometimes... I guess new shiny things always want to be tried
can't decide on 5W-30 or 10W-40, but I'm leaning towards the 10W-40