I have a 1998 Ford Escort SOHC that has been run mostly on whatever Jiffy Lube adds (though had a brief shining moment with Amsoil 5w-30). It is currently doing a Auto-RX treatment with SuperTech 10w-30 Syn Blend. After that is done, I plan on running Mobil Drive Clean 5w-30 to complete the treatment. My head is swimming from all the suggestions here, but I am curious - any recommendations for an oil to use after that? I plan on keeping this car for sometime, and want to keep it in the best shape possible.