For oil,
http://www.countrymark.com/countrymark/aboutus/americanoil.aspx
They make oils, gear lubes, etc., but, they also make fuel as well.
We buy the diesel fuel for our farm from them. They are also expanding their gas stations, and just opened one in Muncie, IN which is where we go for shopping and supplies.
We like them because not only do they source their crude from the Illinois Basin, but, they offer a 91 octane version that is ethanol free.
To make it even better, they are now top tier as well.
As far as oil filters go, that one is harder. Ten years ago, I would have said Purolator, and while they are still making them here, they have been bought out. Champion Labs, maybe? Although, they have been bought out as well. It gets confusing sometimes, in the last couple of years it seems as if there have a lot of buy-outs, mergers, and takeovers.
The good news is that walking into our local home improvement stores, it seems like more and more items are being made in USA.
Seeing how we live in Indiana, it's nice to see the Toyota Tundras being built here!