You certainly must buy a swift diesel, ideally during December 2019 or discount sales in sluggish season.1) From April 1 ( 1 month before April 1st) swift diesel will be discontinued & Diesel versions in BS6 is certainly possible in future, but BS6 versions will at least be ₹1.5 lakh to ₹2 lakh costlier than their petrol counterparts.2) Direct answer to your query, is millions of Maruti multi jet diesel engines ply on Indian roads & Maruti gets several thousand crores assured annuity income from spare parts & servicing of these vehicles & therfore both are assured, for your life time.3) Maruti multi jet diesel engines have a life of 10 lakh km & require only timing chain replacement every 1 Lakh km, along with cleaning fuel injectors every 1.5 lakh km, in addition to normal periodic servicing every 10,000 km, which involves replacement of engine oil, air filter & fuel filter ( every 20 K)4) please note that Turbo, intercooler, will require replacement after 1.5 lakh km, clutch after 80 k.5) so the gist is that the diesel engine is almost maintenance free for 10 lakh km, other than routine engine oil replacement every 10 k & replacement of timing chain every 1 lakh km. Of course the engine bolts will have to be tightened or bolts replaced after a lakh km6) so go ahead & buy a swift diesel for a lifetime. The only reason why maruti has discontinued diesel engine is fiat has not thus far upgraded its 1.3 multi jet engine, which has won laurels for its performance, durability & mileage.7)My own view is, that fiat may introduce a 1.5 multi jet diesel engine, which is BS 6, compliant, & this will find its way to maruti & Tata diesel cars in india.
