I did a search but couldn't find a thread on doing a one time moly treatment to 4.7L Toyota engines. I change my oil and flter regularly at 5000 miles with 5w-30w synthetic oil at the Toyota dealership. Is that all I need to do? My 2000 LX470 has 256,000 miles running strong. I replace the timing chain, pulleys, etc at 100,000 mile intervals too.