Yes, it shows a small amount of smoke at idle, which as Greydog has stated may be caused by EGR and vacuum hoses, etc but if oil/excess fuel is being burnt then if it's coming out of the exhaust then it should be measurable.
Any garage with an MOT station should be able to carry out a 4-gas & Lambda test and give you a print-out of the results.
Also, as Greydog has mentioned, running cleaner in the fuel to clean through the engine along with a good blast will almost certainly improved things