Comparison of used NASCAR race oils from 1998 and 2018

[Dave P.]

https://torquejournal.com/slick-secrets/

Interesting article comparing used NASCAR race oils, a 20W-50 from 1998 and a 0W-20 from 2018.

 

[Jetronic]

alas, on different engines aswell

 

[Hirev]

In 20 years the race oil sure changed a bunch. Look at that moly difference.