Toyota CVT 2017 Corolla. I can get OEM fluid, but if I take to an independent shop they will use either Idemitsu or Eneos CVT fluid and they charge about $100 less for a drain and fill and about $40 less for a brake fluid flush. Any harm in mixing those aftermarket fluids in the CVT with a drain and fill? I'm assuming, given their quality level, it's fine. I'm not OCD, so I just want some old fluid out, new fluid in. And just want something that will work. Don't really care to bring my own fluid and all that silly stuff. If it's that big of a deal I'll just go to Toyota dealer. Confirm for me it'll be just fine.