I wanted to get some opinions on this before I decided to listen to my carb builder. I'm running Gibbs XP1 in my 602 crate. I'll run 2 races, change filter, and add fresh quart. After 3 times (6 races total), I'll drop it all and put in all new. I was told to measure how much oil I remove when I dump it all and only put that much back in. I've always put in a full 8 quarts in my race motors after changing the oil. I am told that there is at least 1 quart of oil that never comes out during an oil change. Everyone is big on every little edge on these crate motors, but I am not interested in running it low on oil at all.
Anyone do it this way?

Anyone do it this way?
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