I have an '04 Civic and Honda specifies 5w-20 weight oil. I read some good comments on German Castrol so I went to Autozone today and found it but it only comes in 5w-30 there. So I was wondering if running 5w-30 will hurt the engine? And most importantly will it void my warranty? Also is more moly good or bad? Lastly from the following list of oil can you pick one and explain why you chose it over the other one? : Mobil 1 0w-20
Castrol Syntec 5w-20
German Castrol Syntec 5w-30
Penzoil Synthetic 5w-20
Castrol Startup
Or any other good suggestions.
Castrol Syntec 5w-20
German Castrol Syntec 5w-30
Penzoil Synthetic 5w-20
Castrol Startup
Or any other good suggestions.