what oil would you guys recommend that i use when i do my oil change very shortly?

 

I personally use Mobile Delvac. Used to use Rotella T, but was using oil between oil changes. I don't use any with the Mobile.

 

I use AMSOIL Heavy Duty Marine and Diesel Oil, 15W-40. It has an extended drain interval of one oil change per year or every 25,000 miles. I also use Donaldson Extended Life Oil filters with the same extended drain interval. I change it out every 20,000 miles. Saves a ton of money in oil changes and I have been happy with its performance. Just go to AMSOIL.com if you want to read about the product specs. Hope that helps.