Colonel,
Just to start, your diastolic blood pressure is perfectly normal.
Systolic blood pressure is the pressure in the aorta as the ventricle ejects its contents into the aorta. As the ventricle empties its contents, pressure in the aorta falls, the lowest pressure achieved prior to the next ventricular beat is the diastolic pressure.
The level of the diastolic pressure is determined by a number of facotrs which include the volume of blood that the ventricle ejects, the ability of the aorta to accomodate the volume of blood from the ventricle(called compliance), and the resistance in all of the arteries in the body that the aorta empties into.
The pulse pressure is equal to the systolic pressure minus the diastolic pressure. As we age our arteries stiffen. In the abscence of any other heart disease, the most likely explanation for your widened pressure would be increased stiffness of your arteries from aging.
If this is the case, your focus should be on stringent blood pressure control, and a regular exercise regimen.
good luck
My systolic pressure is 128-135 but my diastolic pressure seems to be loo low: 60-70
Is this o.k. ?