If your skin is still genuinely oily in your fifties or sixties, every primer recommendation you find is written for one of two other people: someone young and oily, or someone mature and dry. The products aimed at the first group make mature skin look worse, and the products aimed at the second make an oily face slide.
Why this combination is hard. Shine control works by absorbing oil and by laying down a film that holds back what the skin keeps producing. Both of those mechanisms are drying by design, and the result on skin that has lost elasticity and gained texture is a flat, tight finish that gathers in every line. So the standard answer to oil is the standard way to age a face.
It is also rarer than the search suggests. Sebum production falls with age, so a face that reads as oily over 50 is more often combination — an active T-zone with cheeks that have gone dry — than uniformly oily. It is worth knowing which you are before you buy, because the two need different handling. If only your nose, forehead and chin shine, the page you want is best foundation for mature combination skin.
What actually works is a dry-touch finish, not a matte one. The distinction sounds like marketing and is not. A mattifying primer aims for a visibly flat surface and generally gets there with silicone elastomers and oil-absorbing powders at high load. A dry-touch mineral or blurring primer aims only to stop the surface feeling and looking wet, using less absorbent material and relying on light diffusion instead of on a thick film. The second category controls most of the shine with a fraction of the drying penalty, and that trade is the right one over 50.
Placement beats formula strength. Primer on the T-zone only, nothing on the cheeks, is more effective than a stronger primer everywhere — and it is free. The general case for primer at this age is on do you need primer over 50.
What we looked for. A finish that is dry rather than flat; blurring by light diffusion rather than by film thickness; nothing that needs a setting spray to stay put, because there is no setting spray in this registry; and a container that opens and meters with weak or sore hands.