The Magnuson Moss act prevents any manufacturer from denying or specifying a warranty requires the use of factory parts/fluids unless they want to furnish said parts and fluids
Magnuson Moss Warranty-Federal Trade Commission Improvements Act
Title I of this Act authorizes the Federal Trade Commission to develop regulations for written warranties. The Act directs the Commission to establish disclosure standards for written warranties, specifies standards for “full” warranties, limits disclaimer of implied warranties, and establishes consumer remedies for breach of warranty or service contract obligations. The E-Warranty Act of 2015, Pub. L. No. 114-51, 129 Stat. 494, amending this Title, requires the Commission to revise its rule on pre-sale availability of warranties to provide that disclosure of a warranty on the manufacturer's website complies with the rule so long as (a) the location of the website and an offline means of obtaining the warranty are indicated on the product, packaging, or manual, and (b) the seller makes the warranty available at the location of the sale before purchase.