I have a Chevy cobalt with a 2.2 l engine and 92000 miles. The car drives fine and shifts fine it idles a little funny though when I first start it up as in it idles high for about 30 seconds. After driving a while it’s like a new vehicle. I do notice a little blowby and a little bit of oil on the spark plug closest to the passenger side. It is full on oil and isn’t burning or leaking oil. Could I get some oil flush I heard it can sometimes fix blowby. If not what should I do?
Those are probably made vehicles and yours is just flat wearing out you could try something like Lucas heavy oil treatment it might slow it down a little but if it's only doing it one cylinder those Pistons are wearing out
Check to make sure your pcv valve is clean and working.
As Scotty said, it is likely just wear and tear. Those cars were built as throwaways so if you get 100k out of it you've done well.
