The Tesco own brand oil as mentioned above is now on offer at £2.98 for 5 lites 10/40. (normally 5.98). The shelves were almost bare. I looked at the spec and it was SJ certified etc. Am sure it has been said before on here as long as the spec rating is ok it should do equally as good as Castrol 10/40 standard mineral oil or whatever? Is there really any difference between SJ spec Tesco 10/40 mineral and castrol SJ spec 10/40 mineral oil? Its an old car and was designed to run on mineral oil.
Asda do Texaco 10/40 for 5 litres at 7.98 which is also good value. Have also seen it in Morrisons at a similar price. I have seen the same oil for sale in Texaco petrol stations for 14.99.
I do see that 20/50 stuff in some supermarkets. I do wonder who buys and uses that stuff. I dont see many cars in the supermarket car park that would run on that stuff? You dont see many 1980 cortinas etc in the supermarket car parks. I think on some of those 20/50 containers it has pre 1980 engines written on it.
I think it is a bit of a danger selling that 20/50 oil in a modern supermarket. Makes you wonder how many people think oil is oil and top up their modern engine fords etc with that stuff? Supposedly only about 40% would attempt to change a wheel. Thats the danger when you buy a secondhand car if some idiot has been putting that old sludge in it.