Putting in 7qts of Amsoil 5W-30 Signature Series in this weekend with their EA filter. Can anyone shed some light on being able to go 15k without a change? It says 25k for n/a cars and 15 for boosted and hard driven ones but I really doubt that we could go that long given the abuse most of these cars get.
Every car I've ever owned I changed the oil after 3k, synthetic or not. That's just me, even though oil these days are getting better and better.