I think it is definitely worth a try, I have been using it recently on my 5.0 L Town Car which has been a high oil consumer for a long time. I definitely notice a difference in lower oil consumption since switching to Castrol High Mileage, seems to have been cut down by 50%. The oil seems to stay cleaner longer as well something else I noticed. I like it. The oil costs a fair bit more than GTX, but seems worth it in my case.