Rickster Posted June 18, 2004 Report Share Posted June 18, 2004 Warrenty is out. Last oil change done under warrenty. Close to 3000 miles since change and almost ready to add 2 quarts. Just waiting for sensor to say so. Went to dealer to ask what weight they use and they said 15-40. Can I add 5-30 to her? When I do do a oil change I will swap to 5-30. Is this advisable up here in Canada on the West coast? Rick 2001 STS Mettalic Otter Grey, Black Leather, 213,000 kilometers - miles - ? Still running strong! Link to comment Share on other sites More sharing options...
JohnnyG Posted June 18, 2004 Report Share Posted June 18, 2004 What are you driving? A diesel truck? Never underestimate the amount of a persons greed. Link to comment Share on other sites More sharing options...
KHE Posted June 18, 2004 Report Share Posted June 18, 2004 I'd use 5W-30 - that's what's recommended for 2000+ Northstars. Kevin '93 Fleetwood Brougham '05 Deville '04 Deville 2013 Silverado Z71 Link to comment Share on other sites More sharing options...
Rickster Posted June 18, 2004 Author Report Share Posted June 18, 2004 No idea why they would add the 15-40. I will add this question to my list of unanswered questions that I hope to find the answers to before I die. 2001 STS Mettalic Otter Grey, Black Leather, 213,000 kilometers - miles - ? Still running strong! Link to comment Share on other sites More sharing options...
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