lol 99 crew cab 7.3 here too haha. so how about 5-40 t6 rotella in a newly rebuilt 2jz? ive been using castrol gtx 5-30w
No idea I would go with a thinner oil. My supra likes it but it has a 150,000 unknown miles ya know. My new engine when I drop it in will probably not get t6 oil
Been running it in my 1j for about 3 years now. Last couple oil analysis reports seem to suggest that all is well for the most part. I'd recommend changing by the time you have a year on it. I pushed mine for ~1.5 years, and it seems to have gone up a bit on the wear metals, possibly a bit of an upward curve. I.e. if I kept running that oil, it would have gotten worse, faster and faster, the longer I ran that batch of oil.
Kinda hard to say since I've only had 2 changes checked out so far. Should be able to establish a pattern with a couple more years. All in all though, it's a good oil, highly recommend it.