hi...

when serviced my gearbox oil is silkolene. however, it is currently on the low side and all i'm able to find around my way is castrol (of the same grade/rating though). is it a problem if i use castrol to periodically top it up, or should i keep trying to find the same silkolene that is currently in the car?

incidently, is it normal to have to top up transmission oil regularly?

thanks

 

bump

 

Nobody knows?!