The processor used in the 2018 MacBook Air is an Intel Core i5-8210Y 7W Amber Lake Y processor (Juli Clover/MacRumors)

Juli Clover / MacRumors:
The processor used in the 2018 MacBook Air is an Intel Core i5-8210Y 7W Amber Lake Y processor  —  Apple's newly upgraded MacBook Air is equipped with a 1.6GHz dual-core Intel Core i5 Processor with Turbo Boost up to 3.6GHz, a chip configuration that does not match any of the 8th-generation chips that Intel has announced to date.



from Techmeme http://www.techmeme.com/181031/p2#a181031p2