I would normally say yeah - oil is oil, however that Morissons 20W50 stuff is REAL rubbish - it's the turbo that would take a real hammering. I use it as flushing oil - some garages stock a slightly better budget oil, about £2 a litre, however once you got your old oil out, tip it into the fuel and you have just saved £7 of diesel! If its got big bits of sludge let it settle and take the top 6 litres off. Make the oil change a little cheaper!
The oil gets a hard time going through the turbo bearings, the temperatures are high which breaks it down and reduces it's ability to lubricate. It might be more expensive in the long run. How often are you doing your oil?
IF you need to use the Morrisons stuff, then put it in and make a point of early gear changes and not letting the turbo spool up until the engine is warmed a little (like you should anyway really - but more so with this oil).
I got it quite hot in a generater engine I was cleaning out and it came out sort of diesel thin and seperated and funny.
