Engine oil temp?

What should the difference be between oil temp and water temp? Oil temp is ~10* to 15* warmer than my water temp which is 180*, I pulled a camp trailer today at no more than 50mph and I was running ~205* oil temp and the water temp was rock steady at 180*. I just don't want any problems towing this summer.

I typically see oil temps about 10 deg less then coolant temp. That is measuring using the factory oil temp sender and a digital guage at the thermostat housing. 197 coolant will be about 187 oil.

My oil temps run anywhere from 190-210 during the summer, depending on what I'm doing.

If you still have the original oil cooler there could be some blockage causing it to not cool properly. We have routinely seen casting sand and oil gum up the passages like hardblock. Along the same lines, the cooler could be starting to fail a little causing the oil/coolant to gel slowing flow.

Thanks for the replies, I guess I better get a rebuild kit.

FWIW my oil temp sender is right above my oil filter and my coolant temp sender is in the thermostat housing.

Oil temps 10-15* is typical and expected. Oil is only cooled by the water, therefore, except for start up, oil temp will always be hotter than the water.