[au350hp]

Only ever used Penrite but I have played around with semi synths & full in different weights. I have found, like many others, that Penrite HPR5 is the most agreeable oil across the board. I have never noticed any oil loss at changes, mind you, I only use the dipstick as a gauge, but I do change oil & filter every 5000kms without fail. I know it's overkill but I like to think I am extending the life of the motor but most importantly, I enjoy spending the time working on the car and checking things over myself.