tesco oil should be genuine otherwise will be sue by manufacturer right. but the problem is packaging at UK and the quality is not par compared to oil in local.. if im not mistaken and some of it is not up to date also..
if u guys insist to buy the oil from tesco.. u should check the quality of the oil


SG = Introduced 1989 has much more active dispersant to combat black sludge
SH = Introduced 1993 has same engine tests as SG, but includes phosphorus limit 0.12%, together with control of foam, volatility and shear stability
SJ = Introduced 1996 has the same engine tests as SG/SH, but phosphorus limit 0.10% together with variation on volatility limits
SL = Introduced 2001, all new engine tests reflective of modern engine designs meeting current emissions standards
SM = Introduced November 2004, improved oxidation resistance, deposit protection and wear protection, also better low temperature performance over the life of the oil compared to previous categories