[superek4]

no Matter how thick the oil unless it's lock diff then there's no differenial. That's what a diff is for.

Only 1/10 on road we use spool or lock diff.

In 1/8 if your oil is thin the wheel spin faster making it harder to drive. No matter bash or race we use diff oil rather than grease becoz grease when get hot is not consistant.

We usually use thin oil at the rear diff.

Btw 2wd 1/10 ep cars has slip diff. Same goes for higher range 4wd 1/10 cars they have slip clutch.

Ask anyone here who does 1/8 conversion. There's no such thing as using thin/grease oil to allow less strain to the drive train.

When the gear is jam it's jam. Take alook at slip clutch or slip diff they have springs n metal plates to allow slip.