Originally Posted By: attodds
I just bought a 2008 lincoln mkz 8n great shape for my wife who drives over 100 miles a day. And am considering using Amsoil oil and filter. Is it worth $$$
Yes, it's worth the money if you can use it to its potential. Extending your OCI using UOAs is the only way to be sure (true with any oil).
I'd start with a baseline UOA at the factory OCI, leaving the oil in and extend from there. Blackstone is usually conservative about their recommendations, so then you could do the same test at their recommended additional mileage, and so forth. Then once you've figured out how long the oil can safely go with your wife's driving style, you can make the decision as to whether to continue with Amsoil SS or not. So if your engine is easy on oil, Amsoil will save you $$ and time in the long run.
I'm an Amsoil fan/user, but even so if your engine breaks down oil quickly there's no reason to try to extend your OCI and you would be better served using an inexpensive oil....such as:
Originally Posted By: Pablo
If you aren't doing extended changes, get Amsoil OE 5W-20 (Product Code OEM) and save money over Mobil 1.