Markb

Evening, I have a 65 plate 1.4turbo meriva. I was having problems with it juddering when getting upto 40mph and then smoke coming out of exhaust. No engine lights on dashboard but garage changed ignition Coul pack and plugs and this seemed to solve issue. A month later I noticed oil level was low so topped it up and 30 mins later the juddering started again. Has anyone had similar issues?