I Know that oil is a dangerous topic on any forum. I have downloaded the Workshop Manual and see that the spec is 10w-30 above SG rating. For many years now I have run all of my bikes including Aprillia RSV4Tuono, 07 Aprillia Tuono, 08'Aprillia Shiver ,05 Vtr1000f, 01 TRX850,95 FZR1000, 98 Suzuki TL1000s, 92 Duc 900SS, 08 848 Duc, on dare I say it Mineral Diesel oil. Never had any problems . The question is this, Does anyone on here use Diesel oil in their VFR1200f and if so what brand and specification ? Sorry about the question however, it will save me a lot of research. Thanks in advance. Cheers from Australia.