Hi Guys, I have a 2009 Cadillac DTS that I bought used from my grandfather for my 16 year old to drive periodically. It has about 50K miles on it and has been a reliable and easy to maintain car (so far). It either has had or has recently developed a small oil leak (may be the dreaded Northstar leak where the engine has to be pulled to fix). A $2-3K repair is not in the budget, so I have used a can of LubroMolly Oil Saver along with the recommended Mobil 1 5W-30 and it seems to have attenuated it somewhat.
The best I can tell, it only leaks after the oil has been brought up to full operating temperature and then parked, where I see a small amount of oil on the ground after it has been parked. It does not continue to leak after the oil has cooled, and is not/has not leaked enough to where I am having to add oil. The fill level looks consistent after many checks, so it appears to be a small issue at this point.
Here's my question. Would it be worth it to try Mobil 1 0W-40 or a similar 40 wt syn on the next oil change (with or without the addition of the LM Oil Saver) in order to see if the condition improves, or should I stay with the recommended 5W-30 and LM Oil Saver and continue to monitor closely. The car has a 7 qt sump by the way. Thank you.
And.... before someone bemoans my choice of this car for a new driver. I bought it primarily because it is a safe car and because of a very generous sale price that was about half of what it would be worth on trade in (and also because my son is very tall and needed something with some extra leg room). I know they can be very expensive to repair if something goes wrong and I took that gamble knowing that I spent what I would have spent for a high mileage Accord, Charger, or Fusion.
The best I can tell, it only leaks after the oil has been brought up to full operating temperature and then parked, where I see a small amount of oil on the ground after it has been parked. It does not continue to leak after the oil has cooled, and is not/has not leaked enough to where I am having to add oil. The fill level looks consistent after many checks, so it appears to be a small issue at this point.
Here's my question. Would it be worth it to try Mobil 1 0W-40 or a similar 40 wt syn on the next oil change (with or without the addition of the LM Oil Saver) in order to see if the condition improves, or should I stay with the recommended 5W-30 and LM Oil Saver and continue to monitor closely. The car has a 7 qt sump by the way. Thank you.
And.... before someone bemoans my choice of this car for a new driver. I bought it primarily because it is a safe car and because of a very generous sale price that was about half of what it would be worth on trade in (and also because my son is very tall and needed something with some extra leg room). I know they can be very expensive to repair if something goes wrong and I took that gamble knowing that I spent what I would have spent for a high mileage Accord, Charger, or Fusion.
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