Not the bargain it once was The decline of the diesel market penetration in Europe has begun, and for solid economic reasons. With diesel now costing the same as gasoline in Germany (we should be so lucky) the higher up-front costs of most diesel versions just doesn't pan out. Auto, Motor und Sport (print version only) has done an analysis of the minimum km per year required to amortize various diesel versions of popular cars. A few examples: 38k km (23k miles) for the BMW X-5; 30k km (18.3k miles) for the Opel Corsa, 25k km (15.3k miles for the MB E-class). Market share of diesels dropped in May to 44 percent, from 47 percent in April. At this rate, the study predicting diesels will lose fully half their market share in Europe are well on track. Another study shows that at least one-fourth of current German diesel drivers are seriously considering switching to a gas car with their next purchase.