This is the Mobil 1 Warranty:
https://nudl.es/m1-oil-warranty
This is the Pennzoil Warranty:
https://nudl.es/penz-oil-warranty
This is the Quaker State Warranty:
https://nudl.es/qs-oil-warranty
The Pennzoil and Quaker State warranties are hands down better than what Mobil offers. The Pennzoil warranty is the easiest to navigate, with Quaker State being very similar. Mobil's warranty is the most ambiguous. They make it pretty clear that unless eight planets align in the solar system on February 30th, the year of the claim, you, as a customer, are SOL. I may be a Mobil 1 fanboy, but their warranty sucks.