It's not recommended, but I've never had any problems with my other car. I kept changing oils in it to try to find the best one that I liked and never noticed a difference in any of the brands.
Of course, I was doing this on a 78 Mustang that had 130,000 miles on it, so no oil would make a big difference anyway.
But, it's not recommended...........I'd say to stick to the Valvoline, but I also haven't heard good things about them (sludge, etc.).
theres a huge debate over this it seems. you go ask 100 people you're gonna get close to 100 different answers. Personally, I wouldnt switch oils every change to find one you like, but I mean if you wanted to switch to a new type now, there shouldn't be a problem