Run 1 quart of atf every oil change in the engine and the rest one weight heavier oil. This Toyota was a disaster 20k ago when I replaced the valve cover gasket after my dad bought it. The intent behind these pictures wasn't to show how clean the engine is but if you look at the timing components you can see that there isn't a spot of sludge. We started at the 1st change and ran it on about a 50 mile run through mountains to get it hot and changed it. The 2nd was at 500 miles. The 3rd was 1000 miles. The 4th was 3000 miles. It has been on a 5000 valvoline synthetic and atf ever since. We use Wix or Napa Gold filters.
You must be registered for see images attach
You must be registered for see images attach