Thanks Bludger, it's only because I know that as a rough reason for my usage of 15w50, as I'm not as mechanically sound as the rest of you, and I have full trust in my mechanic, hence sorry if the way I spoke is misleading, but is it wrong for that to be agreed as safe even if my car is not burning oil at lower viscosities. 15-50 does not push the viscosity too far counting for Aus's weather?