We just had oil cooler and erg cooler replaced last week after getting sludge coming out of coolant reservoir. We drove it for 5 days and have oil in jug again. Oil light came on this time and oil pressure dropped. It took a gal of oil to fill back up. Shop is going to try another oil cooler tomorrow. How often do they have faulty oil coolers? What else could it be and what should I do?

 

I hope it's not a head gasket leak.

 

sounds stupid...but did the flush the coolant system?

if they did...did they flush it with dawn soap or simple green?