The set of pistons i bought for the 1.4 liter conversion of my Swift had some kind of friction reducing coating on the piston skirts. As per Maruti Suzuki all of their K series pistons has this friction reducing coating on the skirt to reduce friction. But are these coatings worth it? When the Swift's engine was disassembled I noticed that skirt coating on the old pistons which had done around 13500 kilometers has already worn off. So what is the purpose of this coating is it only to help during the break-in of the engine?
Piston with Coated Skirt
Piston with Coated Skirt
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