Revolutionary premium synthetic motorcycle oils made from natural gas; first of its kind from Shell Advance. ULTRA: Shell Advance 4T Ultra with Pure Plus Technology is our top tier 4 stroke motorcycle engine oil. This 100% synthetic Ultra tier comes in 10W/40 and 15W/50 viscosity grade with SN and MA2 specification. The fully synthetic Shell Advance 4T Ultra is made from pure and clear base oilmade from natural gas. It also contains a motorcycle specific additive pack with unique Active Cleansing Technology. Shell Advance 4T Ultra has been race proven and endorsed by leading motorcycle manufacturers such as Ducati.. AX7: Synthetic based AX7 tier is offered in 10W/30 10W/40 and 15W/50 viscosity with SM and MA2 specification. AX7s part synthetic content consists of Gas-to-Liquid (GTL) base oil and motorcycle specific additive pack with Active Cleansing Technology.