I have a 99 Malibu with the 325 Monsoon. I've had the injectors reconditioned , new spark plugs, the compression test was good , I even tried letting the pressure off of the fuel system when I was done. It starts and runs great, but after about 4 or 5 hours of running it gains about a quart on the dip stick. I thought I was a decent mechanic , but this one has me stumped. Thanks in advance for any help out there!
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