Is it ok to have changing oil viscosities?

[Egan101]

It's a waste to replace high quality oil such as Amsoil every 6 months with 5k kms or about 3k miles. Don't overthink it man! Change it every 6 months with conventional oil or every 12 months with synthetic.

But hey, it's your money and time.

Unless your car's engine requires fully synthetic oil only. You have no choice but stick to its needs. With my Fiesta Ecoboost before, I just change oil every 10k km and it covers a period of around 12 months.

Buti pa VW cars, change oil (FS only) every 15k km or 12 months.