yup, can do most things yourself...
oil, oil filter, air filter, plugs, leads, clean sump plug, oil flush, coolant, check brake fluid. and a few other things are well within a complete beginners grasp.
means that instead of paying a garage to put tatt into your car, you can instead of spending moneyon someone elses labour, put quality oil in your car. e.g selenia 20k, which is about as good as it gets for your fiat.
rubbish MPG could mean a sensor has burn't out/getting bad. I know with mk1 puntos they can often loose their settings for fuelling within the ECU, and can get appualing economy (20-24mpg MAX when driivng like a granny
) its down to the ecu forgetting the map I think. take it out for a proper drive and put it thru the entire rev range in 3rd/4th, should be alright after that.
just running em round town = poor milage anyway, but makes the ecu run them rich.