i think shell helix plus 10w -40 is for gasoline only. meron naman oil ang shell na pang diesel which has different viscosity. you have to follow the viscosity of oil recommended for your sportivo, nasa manual naman yan eh. di lang ako familiar sa diesel oil nila. just ask sa shell station dun sa service bay nila.
Ynung Helix blue 10W-40 ay pang gasoline mostly ang application. I have tried it before on my 4d56, ok sa na, pero after a few thousand kms, hindi na ko satisfied. Parang mabilis lumabnaw at iba na andar ng diesel. And I think mababa ang API rating nito pag sa diesel compared to other oils that are intended for diesel application.
Kung talagang Shell ang gusto mo, there are several good diesel engine oils from Shell. Rimula X, yung Black container yung pinaka ok na na try ko. API CH-4 na rin yun. Sa Helix line up, I think meron din silang pang diesel na application, although I haven't tried using it.