Mobile 1 full synthetic & Royal Purple ATX... good stuff really makes a difference! Well when I used Royal Purple to change my tranny fluid it really shifted better. My friend who has a Celica GT-S says that he can shift gears easier. THE BEST STUFF!
ya, 5 quarts would be fore like a 5 cylinder... i know that i usually use about 4... but make sure when u change the oil, that the 4th quart make sure to pour it in half way then see how much more u need.. dont pour it all in it might b to much. also make sure to run the engine after your done for about 5 mins cuz the oil needs to circulate.
I'm not positive, but I think that if you use the 626 oil filter, which is a bit bigger than the MP3 oil filter, you can use a full 4 qts. Again, not positive.