Hi, I've switched from castrol to mobil 1 just due to price locally. can I run a 5w30 M1 in the winter and switch to 10w30 in the summer? the car in question is a ;99 integra ls. The manual calls for either depending on temp.. Also the car sees the odd track day in the summer, and I've heard iffy things about M1 5w30 for anti wear. Thanks.