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  #1  
Old 01-19-2011, 10:12 AM
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Another oil question

My truck has been faithfuly running Rotella 15w-40 but where its getting older I want to use the 5w-40 . Where I have been using the regular stuff for so long will it hurt to go synthetic? Will it use oil if I do this? Any and all info on this would be great. Thanks.
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Old 01-19-2011, 11:04 AM
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it'll be fine. you could run it year round.
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Old 01-19-2011, 11:22 AM
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So no extra oil consumption? Thats cool thanks. I don't want to get in an argument on oils but is the Mobil 1 ok?
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Old 01-19-2011, 11:25 AM
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NAPA has the Valvoline Extreme 5w40 syn on sale $19 a gal
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Old 01-19-2011, 11:30 AM
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Quote:
Originally Posted by cj45lc View Post
NAPA has the Valvoline Extreme 5w40 syn on sale $19 a gal
I run Valvoline in my gassers with no issue and thats a lot cheaper than the mobile 1. Thanks, theres a napa right on my home home.
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Old 01-19-2011, 03:46 PM
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Just remember that the full synthetics have a tendency to leak a little more than conventional oils. I have seen all too many times where you suddenly "develop" a leak after switching.
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Old 01-20-2011, 04:41 AM
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This may be a stupid question but if it starts leaking the synthetic can I go back to the regular oil or is it to late once the leak starts?
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Old 01-20-2011, 05:29 AM
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u may just wanna stay with that oil if it'll leak, i mean ur truck's not givin u any problems is it?
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Old 01-20-2011, 05:38 AM
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No leaks but I am having hard starts on cold mornings even though the entire glow plug system is working.
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Old 01-20-2011, 05:40 AM
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well that can be anything (although u r on the right track)
do u let the glowplugs sit for a while?
do u plug it in?
how is the lift pump/injection pump?
how r ur injectors?
how is ur fuel filter?
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