Hi all I'd just like to recommend an oil especially for the rv8. It's pennrite hpr 10/50. It's an Aussie oil available from classic oils in Bicester. To sum up it's a full synthetic( hydrocracked petroleum base) with plenty of zddp. With a thicker warm rating.so called extra 10 ie it's 10/50.other viscosities are available. This one is £30 for 5 l delivered. Try it I was really impressed.
Jb ps I have no affiliation just buying something like Valvoline vr1 dino 20/50 was quite pricey for a cheaply made super basic oil annoyed me.