Hi All, When i went to R-tech i was told i had cheap oil in my car and he said i should use quantum oil or another premium oil. i just phoned TPS and they said it was £14.91 inc VAT that cant be true surely? i thought it would be like £40+ that was for 5 litres aswell! it is 5w40 i need aint it? oil filter was £5.49 which is about right but still shocked about the oil!