Valvoline recomend all fleet sae 30 http://www.valvoline.com/pages/produ...sp?product=106

Its a diesel oil.

Any experince with that?

engine is a rebuild 355 with hyd/roll cam

Thanks

 

a lot of experienced builders use it or something similar for break in oil. it would be at or near the top of my list.

 

so even with a hyd/roll cam you can benefit from using this oil?

 

We use Rotella to break in all of our motors.

 

Is that equal to the Valvoline fleet sae 30?
Dont know if i can get rotella in Sweden

thanks

 

an diesel oil would work out well. Shell rotella is what we use in the states, but that fleet sae 30 sounds like a good choice as well.

 

Not really. A petroleum-based oil is all that is required. With a roller cam, all you're "breaking in" is the rings. Extra anti-wear protection isn't really required.

 

That is more of a concern with flat tappet cams. Any quality conventional motor oil will do.

 

ok, thanks

 

It is fairly close. The good thing about diesel oils is that they have the extreme pressure additives that were long ago removed from automotive oil by the enviro-police.
These additives help in a new engine, where there is certainly extreme pressure.
Another option is for you to get GM EOS (engine oil suppliment) at a gm dealer , or online. It will also replace the missing additives.

 

There are no more extreme pressure situations with break-in than there are with running, with a roller-lifter engine. You want the rings and cylinder to run in with each other, which is why you use petroleum-based oil vs. synthetic.

The anti-wear additives that were removed for emissions reasons have to do with shear, which is the flat-tappet situation. Yes, ring-to-cylinder is shear, but it's not extreme pressure.

And it wasn't "eons ago". The GF4 spec came out in 2004, and was enforced beginning in 2005.

 

who said anything about eons? I was just writing for dramatic effect.

 

Okay, "long ago". (Sometimes I read too fast; the brain mixed the time reference with the enviro reference and came up with "eons".)

There was a zinc reduction back in the 80's that caused some problems with German Ford OVC 4-cylinders. But, the latest reduction that has caused more general flat tappet problems was very recent.

Aftermarket cam quality is another issue that has been problematic in the last 10 years or so.

 

Since it's a roller cam...just be sure not to use any kind of synthetic oil when you break it in or it will wear the lobes on your cam flat as a pancake.

 

Actually, that can happen if you break in a flat tappet cam with synthetic oil. It won't happen with roller lifters.

 

so maybe I was exaggerating a bit
Thanks for setting me straight.

 

Sorry you're right Five7kid. Smoked too much crack before I came to work today Was off in lala land...it's quite nice there sometimes...