Mazda Repair Questions? Ask Mechanics for Answers ASAP
Hello and thank you for your question,I would start with removing the oil pressure sending unit and installing a Manuel gauge and monitor the actual oil pressure when starting the engine. If you find the oil pressure is low or slow to come up then you are very likely looking at possible sludge build up in on the oil pick up screen or a weak oil pump. One other thing you may want to consider doing with the amount of mile you have on the engine would be to do an engine flush, add a quart of engine flush and run it for about 15 minutes and then drop the oil and flush out and add fresh oil and recheck the operation . If its sludge build up the flush may very well resolve the problem. Post back if you have more questions and or need more help and we can work from there.