This increases production and operational costs, and often leads to problems. Mazda's diesel doesn't need AdBlue, yet still uses it. Why? The debut of Mazda's Diesel engine caused quite a shock.

The most common problem with the CX-5 diesel, older versions, is a blown head gasket, which makes the engine overheat. A city motorist, who had acquired his 2014 CX-5 Mazda diesel in early 2020 ...