Hi Guys,
I purchased a 2009 Caddy DTS (with about 45K miles) from my grandfather about 2 years ago and noticed it had a mild oil leak. A little research led to the fact that it is pretty common for these engines and that it is VERY expensive to have it fixed because of the large amount of labor required. Noticing that the current fill at the time was a little low (7.5 qt sump) I topped it off with a little M1 5W-30 (the recommended oil and what was in it a the time) and a can of LM Oil Saver. After few hundred miles, the oil leak was still present, but noticeably improved.
I ran that mix for about 3K miles, and then changed the oil to straight M1 5W-30. The oil leak returned to its former state within a couple thousand miles and I thought that adding more Oil Saver might overfill it, so I just left it alone for a 5K miles total run.
The current fill is Pennzoil Platinum HM 5W-30 with no additive. That slowed down the leak very slightly but not as much as when I was running the Oil Saver with the M1. Once the oil has cooled to ambient temperature, it stops leaking, but definitely puts some oil on the ground while the oil is hot.
The PPHM has been in for about 5K miles, and I will be changing the oil again between now and Halloween. Without buying anything new, I have at my disposal the following options that would work in the Caddy:
- 5 qts M1 0W-40 (which I understand is now kind of a heavy 30wt / light 40wt)
- 7.5 qts of PPHM 5W-30
- 1 can of LM Oil Saver
I was thinking about running the PPHM with a can of Oil Saver in order to further quell the oil leak, and change it every 7K miles or so with a can of Oil Saver every time. Do you think this is a sound theory or would you recommend a different course of action? Thank you for your input.
I purchased a 2009 Caddy DTS (with about 45K miles) from my grandfather about 2 years ago and noticed it had a mild oil leak. A little research led to the fact that it is pretty common for these engines and that it is VERY expensive to have it fixed because of the large amount of labor required. Noticing that the current fill at the time was a little low (7.5 qt sump) I topped it off with a little M1 5W-30 (the recommended oil and what was in it a the time) and a can of LM Oil Saver. After few hundred miles, the oil leak was still present, but noticeably improved.
I ran that mix for about 3K miles, and then changed the oil to straight M1 5W-30. The oil leak returned to its former state within a couple thousand miles and I thought that adding more Oil Saver might overfill it, so I just left it alone for a 5K miles total run.
The current fill is Pennzoil Platinum HM 5W-30 with no additive. That slowed down the leak very slightly but not as much as when I was running the Oil Saver with the M1. Once the oil has cooled to ambient temperature, it stops leaking, but definitely puts some oil on the ground while the oil is hot.
The PPHM has been in for about 5K miles, and I will be changing the oil again between now and Halloween. Without buying anything new, I have at my disposal the following options that would work in the Caddy:
- 5 qts M1 0W-40 (which I understand is now kind of a heavy 30wt / light 40wt)
- 7.5 qts of PPHM 5W-30
- 1 can of LM Oil Saver
I was thinking about running the PPHM with a can of Oil Saver in order to further quell the oil leak, and change it every 7K miles or so with a can of Oil Saver every time. Do you think this is a sound theory or would you recommend a different course of action? Thank you for your input.