multi viscosity, straight weight ?? what are you guys using.........

thanks, for any input...

Royal Purple break in is 10W-30. Driven's original break in is 15W-50, they now offer I believe a 10W-40 and a 5W-30. My point is these 2 brands that I know of that are break in specific are a multi viscosity

i like to do the first 30 minutes of run time with a thinner oil[usually 10w30] because it flows well and it is going to get dumped before i beat on them,imo the thinner oil is good for getting into the hyd roller lifters quicker.

I have always used Rotella 15-40. Works great and is cheap

Same here it works. Some times I'll use the same oil on second engine. But new filter. Lol

I knew Rotella would come up eventually! I have no desire to get into yet another oil debate. However, Rotella is a diesel oil. It is designed for much lower RPM's than what you will be turning. Also, over the last year or two Rotella has also reduced the parts per million of zinc in their oil (in accordance with gov. standards). The comment is always Rotella is cheaper. Seriously! You just spent how many thousands on a new or rebuilt engine and your looking to save a twenty dollar bill the first time it's fired up! I really don't get it.

I think Rotella has changed again or is changing again. Worth a second look for those that use it.

Clarification please, are you saying its gooder or badder..........lol

Badder.

I don't think RPM designed for is anything different than a big diesel the bearing surface speed is probably about the same considering the size of the journals in a diesel..