7b43fea6_FAQ_s___Gulf_Oil_Limited__HOW_IT_WORKS
[ADDITIVE] Viscosity Index (V.I.) Improver [WHAT IT DOES] Reduces rate of change of viscosity with temperature [HOW IT WORKS] 
Additive thickens with increasing temperature thereby preventing oil from thinning out too rapidly
FAQ's : Gulf Oil Limited
HOW IT WORKS