Recently the weather's been getting warmer, so I know it's time for my annual change on the Lexus. After reviewing the maintenance book, it seems as though I've only driven it a paltry 2,000kms/1250 miles in the last year (since March 2019). For oil I'm running full syn Pennzoil platinum 5w30. No leaks/burning as it only has roughly 55k miles Since the car does it's fair share of stop and go driving, I'm thinking I should at least refresh the additive package in the oil. Should I change the filter too? The owners manual says you can get away with doing it every other change... thoughts? opinions?