RE: mvvs 26 petrol and tuned pipe
Aeroboy,
I also can't comment on the 3W oil, but I have to say that having seen the insides of MVVS engines running exclusively on the recommended oil, and parts from engines that haven't, I have no doubt that MVVS have got it absolutely right!
The oil is readily available from MVVS - I just need to check the UK postal regs before buying it.
BTW, the running in oil supplied with the 45, 58, and 116 is the same Mobil oil.