Expert: Robert Summers - 12/5/2008

Question
i have a 1991 chevy s10 that keeps getting a milky substance in the oil. i am not loosing any water and it is not over heating. its a 2.8 v6. i have changed the oil 3 times and keep getting the same results.do you know what it might be? thank you for any information you can give!!!

Answer
Hi Don.... Usually when that happens you have a head gasket problem....although it may be a very small leak...another thought may be that you have a condensation problem....to check for head gasket problem i would go to local parts store and get some cooling system dye...put dye in the rad, drive truck and see if dye shows up in the oil....if it doesn't show up in the oil then you may have condensation problem...it may take a few oil checges to get rid of the milky look to the oil...or try a good engine flush product...after cleaning make sure that your PCV is good and clean and working...hope this helps