I know that 1 quart per 1000 miles is considerd an "acceptable" consimption rate and have owned a car or two that did that, but.... in all honesty I wasn't happy about it. You always worry about it, and you are just a hair away from becoming a real smoker. With today's piston and ring technology, and the broad knowledge generally available on the subject, I don't believe having an engine use
oil at that rate is acceptable. I know it would bug the crap out of me. Quit being so easy on it. Take it out and drive the bejeezes out of it. If it gets worse, tell Rousch to make it right. On the other hand you may just get the rings to finally bite and alleviate your condition, or... it could stay the same. But it's still two out of three in your favor. Somebody mentioned 20W50, and while I'm generally not a fan of heavy oils, in cases where a motor is way loose and ring seal is questionable, going to heavier
oil can sometimes cut down on consumption. Watch your
oil pressure though as too much can put a strain on the pump drive shaft and gear and result in a new set of problems.
Frank