[Texasdoc]

Originally Posted by cycleguy55

15-680s is listed on Canton's site as "8 qt System Capacity" - if you're filling it with 6 quarts you're low by 2 quarts. I'd add a couple of quarts and test it again - that may make quite a difference.

https://www.cantonracingproducts.com...-race-pan.html

It is weird, when I bought it, Canton advertised it as a 7 qt pan. Summit still says 7 qts. On that page you linked, Canton says 9 qts in one place and 8 qts in another. I don't know what they want.

How far down should the oil be when the motor is not running? If I can get a measurement from a known point (block pan rails or bottom of the timing cover) I can fill it to spec, then reset my oil fill mark on the dipstick.