i used to use valvoline oil .. but everyone kept asking why i didn't use carlube *like the dealers use*? .. so i changed .. I don't mind, it saves me a fortune
FWIW I use Redline, because it's supposed to use better base stocks than the other fully-synth oils. For many years now I've always used decent oils. Oil is cheap. Engines aren't.
I can get Millers as well, is that good? Its something like 10W60 full synth? The CarLube stuff is just under £10/5 Litres for full synth 10W50(?), which I thins is a blinding deal!