Cummins has a marketing deal with Vavoline. But, Cummins does ship engines dry to their clients. PACCAR puts a sticker on their trucks stating Chevron Delo is factory fill - Cummins or in-house powered. I have a feeling Gillig, a bus maker in Livermore, CA also fills every bus that leaves their plant with Delo. Ditto with the marketing between Mercedes and GM with XOM, Castrol with VAG(except for Bentley, Lambo/Ducati and Bugatti)/JLR/Volvo/BMW(was Shell) and Shell with Ferrari and Hyundai.
Since Vavoline is in Lexington, Kentucky and so is Toyota and Ford out of Georgetown and Louisville, it would make sense Vavoline could be OE fill if JIT logistics is to be believed. However, Toyota is tight with XOM and Idemitsu.