I recently bought a 2001 Saturn L300 with 80,000 miles on it. I started it cold 3 times over a two day period b4 I bought it and it did not smoke one bit. The oil was in terrible shape but never smoked on start up or otherwise until I switched to synthetic. I ignored the old wives tale to not change over to synthetic oil in a vehicle that is several years old if you are not sure if conventional oil was the only oil that was ever used. Well I ran the car for two weeks then changed the oil to Valvoline straight synthetic 5w 30 . Within a week or two I had a puff of bluish smoke that seemed to get worse on every startup. I changed the oil at 2200 miles and it was filthy which tells me that the synthetic oil cleaned the hell out of my motor inside. I switched to high mileage Valvoline blend also a 5w 30. It is still smoking after 300 miles. I tried to aftermarket fixes with both oil changes. One was Engine Restore. The other was made by Wynns. Still smoking on startup. A longtime friend and retired mechanic recommended putting a little brake fluid in with the oil. After reading up on that potential horror show I decided not to try that. I also have read some online forums where Saturn owners have replaced the valve seals and still had this problem. WTF??????? I am considering going to a 10w 40 conventional oil and then thicker next time if I have to but living in New Hampshire I wont be able to in the winter. Any ideas other than what I have already tried? Thanks for listening. Ed from NH
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2001 Saturn L300 Question: My 2001 Saturn L300, 3.0 v6 throws out a puff of blue smoke on start up.
Answer #1arturo08 April 06, 2013, 22:15Master
synthetics not cause leak but reveal. it has to do with molecular make up being so random in conventional oils, but microscopic and uniform in synthetics.
rec. oil stabilizer treatment with next oil change.
also rec. fuel system clean. ethanol treatment to 1 tank premium.
Replyedgawrysjr, June 22, 2013, 13:03Rookie
Thank you for that. I will try those suggestions.