I have a 94 V6, very similar engine to yours, and Ive been using Mobile1 synthetic 5w30 for the winter for 2 years now and i love it... I always let my car warm up for at least 1-3 mins before i go anywhere though just because i take care of my car. Its 8 years old and runs like new.
I've been using Mobil 1 for years. For the price, it's all you ever need. Even the more expensive ones ie Amsoil, Redline, etc are not worth it. Depending on what you want Mobil 1 is more than up to the task.
I've been using Crappy Tire's (Can Tire) Synthetic even after they changed from their Mobil 1 supplier. Seems to be fine and it's a little cheaper. Remember, it's still 100% synthetic and don't be fooled by the packaging.