Another oil question

[justinlogue5_0]

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.

[Dietoremain]

it'll be fine. you could run it year round.

[justinlogue5_0]

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?

[cj45lc]

NAPA has the Valvoline Extreme 5w40 syn on sale $19 a gal

[justinlogue5_0]

Originally Posted by cj45lc

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.

[nielsencc86]

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.

[justinlogue5_0]

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?

[Isakson]

u may just wanna stay with that oil if it'll leak, i mean ur truck's not givin u any problems is it?

[justinlogue5_0]

No leaks but I am having hard starts on cold mornings even though the entire glow plug system is working.

[Isakson]

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?