For the Cake’s flavour to stand out you should use an oil that is unflavoured and does not infuse its own identity into the cake. Canola oil is one such. Though, you could choose from any other neutral ones too.
Carrot Cake Titbit

For the Cake’s flavour to stand out you should use an oil that is unflavoured and does not infuse its own identity into the cake. Canola oil is one such. Though, you could choose from any other neutral ones too.