Lower temps with aftermarket diff covers? - before/after test

To see if differential covers make a difference, I did back to back tests of stock diff cover temps vs aftermarket diff cover temps. The purpose of this test is to show real-world numbers, while being as consistent as possible to give accurate results. I'm not sure what to make of these results, so let me know your thoughts in the comments! Check out Spelab here; https://www.spelabautoparts.com?sca_ref=8931219.oskdXXU7JaYzC3rn For a 15% discount on all Spelab products use code; Shade15 Other products used; Pneumatic vacuum canister; https://amzn.to/3FXgO8Z Die grinder scrub wheel; https://amzn.to/3HPdZaA 0:00 Intro 1:12 Test breakdown 1:55 Stock test 1 3:20 Stock test 2 3:57 Spelab install 7:21 Spelab test 1 8:46 Spelab test 2 9:23 Test results 10:04 final thoughts