TO-30 Oil Pressure Drop

When my tractor first starts the oil pressure is between 30 and 40. After it runs about 15 minutes or so it drops down to about 7 and stays there. I use a multi-weight oil. Should I use a heavy weight oil (40)? Will synthetic oil protect the engine even with low pressure? And naturally, what engine component is breaking down? Thanks for a great site for novice and pro alike. ([email protected])

That's my story and I'm stick'n to it.

A higher weight multi-viscosity will help keep the pressure up better as it will tend to thin out less at higher temps but still retain a thin enough weight for cold wintery starts.

If your pressure drops to 7-8 pounds warm at an idle and rises with engine speed - no need for concern. I have a to30 and someone once said that any pressure in a Continental engine is enough pressure. 7-8 at a higher speed is not fatal but bears examination if you plan on using it on a regular basis.

Synthetic ? I understand it keeps its viscosity longer but I wonder about its value in an application such as this where dirt is a great factor and it's changed regularly - or should be.

Hope this helps.