I did run 2 stroke in my 200tdi. Cant really remember if I noticed any difference or not should probably get some more really.
In my diesel astra cdti I use millers diesel ecomax. My starters abit lazy and it starts better with this. It's also quieter. You notice when you don't put it in. If you cant use 2 stroke in the td5 maybe this will do. £12 a bottle on ebay and last 5-6 thousand miles adding 50 ml to each tank tho you'd use more in the landy as the astra does 46-50 mpg.
In my diesel astra cdti I use millers diesel ecomax. My starters abit lazy and it starts better with this. It's also quieter. You notice when you don't put it in. If you cant use 2 stroke in the td5 maybe this will do. £12 a bottle on ebay and last 5-6 thousand miles adding 50 ml to each tank tho you'd use more in the landy as the astra does 46-50 mpg.