So today my fiance tells me that she wont be doing her 7.5k oci on her civic with M1 and will be cutting it short to 5k because her dad and his buddy mechanic believe that your engine has to get used to synthetic oil. What is this?!?! Is my engine a baby being switched to formula!? On top of that they both swear by 10w-30 for any application year round. Im disgusted with how much mechanics think they know about oil and shove their lies down our throats. Dads and their old school myth logic and Fram filters......