Oil...what'll This Do??

[ParadiseMJ]

So, long story short.  I "MIS-GRABBED" the 5 qt oil jug and it was too late to return it since I opened it and pored some in.

 

 I put 5/30 in instead of 10/30.  My pressure reads a little lower. I WAS using Rotella 15/30.  Should I dump the new 5/30 or run it.  How much thinner is 5/30 than 10/30 which is what I was going to use.

[Eagle]

In theory, 5W30 is thinner than 15W30 when cold and the same at operating temperature. Go ahead and use it.

[cruiser54]

Yep. Go for it.

[gogmorgo]

I run 5w30 in my 4.0 due to climate, but I run the same stuff year round. Don't worry about it.

[ParadiseMJ]

Thanks all,

 

Actually when I started it up this morning, the oil pressure was at, or even over what it's been for the last few months.   :dunno:

 

So far the pressure seems about right.   15-20 at hot idle, 40-60 at 2K RPM's. :thumbsup:

[cruiser54]

New vs old oil usually is why you observed what you did.

[jimoshel]

My wifes granddad Owned a well drilling business, 3 drilling rigs, 5 1 ton trucks, Half a dozen pick ups, 2 winch trucks, a pulling rig  a couple welders and generators and a shiny new Kaiser every year. The only thing he ever owned that wasn't a Ford. He only used Havoline 5-15 in everything. Must of worked because as long as I knew him, never had any engine troubles.

[FrankTheDog]

Sometimes I do the same thing. Get home go to change oil, damn 5/30, oh well dump it in. Never a problem

[Bobolink]

No prob....I've used 0W-30 synth for several years. I'm back to 10W-30 synth now, but not for any particular reason.