I have a Toyota 4Runner "V6" that has 160,000 miles and it grew up on a diet of mostly PP with a now and then Quaker State Ultimate Durability or Shell full Synthetic. The other day my dad hands me a 5qt jug of Pennzoil conventional that he picked up on sale at Walmart and said here I bought this for you! "Thanks dad" so would it be ok to run this for a short oil change even though my truck has grown up on a senthetic diet?