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What miles did you change Dino to synthetic oil and did your engine start leaking?

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Old 10-16-2007, 11:25 AM
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What miles did you change Dino to synthetic oil and did your engine start leaking?
What miles did you change from Dino engine oil to Synthetic oil? Did changing to synthetic oil start your engine to leak oil any at all?

I am using shell rotella, thinking about going to Valvoline Premium Blue Synthetic. Got about 52,000 miles on the truck.

Thanks
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Old 10-16-2007, 11:32 AM
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Do it around 20K & read my post about amsoil leaks(seems it's not a problem).
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Old 10-16-2007, 01:16 PM
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I switched from Regular Rotella to Rotella Synthetic at 75,000 miles. I am at 78,000 now, don't notice any leaks.
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Old 10-16-2007, 01:32 PM
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Switched at 57500 to synthetic Rotella 5-40. Now at 72000 and no leaks. Truck runs noticably smoother and cold starts are easier.
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Old 10-16-2007, 01:40 PM
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I switched to rotella synthetic at 47000, havent noticed any leaks. have 48500 now
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Old 10-16-2007, 02:03 PM
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I think the whole leaking thing is a myth, I've changed many high mileage vehicles over to synthetic without any leaks or ill effects. Although I'm running regular ol' rotella in my truck now, hey if it's good enough for the semis it's good enough for me!
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Old 10-16-2007, 02:27 PM
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switched at 35k and no leaks. should i be worried?
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Old 10-16-2007, 02:55 PM
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i changed at 15k, no leaks at all
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Old 10-16-2007, 03:14 PM
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changed at 128,000 miles to rotella syn 5w40, not leaks and have 133,000 now. not sure what was run before, but i don't think it was syn oil.
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Old 10-16-2007, 03:25 PM
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Changed at 1k (1024) miles to Amsoil AME 15w-40 and on the recommendation of Blackstone (still showing some 'break-in' materials) changed @ 6078 miles (Rotella CI-4+ 5w-40). No apparent oil usage or leaks.
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Old 10-16-2007, 06:54 PM
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Do you guys extend the oil change intervals when running synthetic??? Blackstone recommended synthetic??? wierd....
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Old 10-16-2007, 07:17 PM
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Changed @15,000 miles from dino Chevron 15-40 to synthetic Amsoil 5-30. No leaks or problems observed.
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Old 10-16-2007, 07:46 PM
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i changed to Amsoil 5-40 (about 15000 miles ago) i now notice my valve cover gasket is wet
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Old 10-16-2007, 07:56 PM
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Changed to Valvoline Extremee blue at 9000k Last December and I just changed it last weekend with 18375miles on that oil. According to blackstone that metals were a little high at that mileage but I could go further If I wanted because the TBN was still very good at 7.5. Also noted that my Bypass was working very well dut to insolubles were lower than average.

BTW I have never had a leak.
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Old 10-16-2007, 10:48 PM
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I changed from Delo400 to Amsoil 15w40 HD diesel and marine motor oil at about 10k miles. I have 43k on the truck now with no leaks.
Scott
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