FEO - Thats the one. All my engines run mineral oil. Cheap and changed every 5000km is perfect. We run mineral oils in trucks, cheaper than synthetic and ensures you change it often. Some synthetics last 80,000km before the first oil changes in trucks, but you need to oil sample every 20,000km and the oil is very dear.

Best just to change the oil alot - beats changing a motor. I think personally synthetic for a daily driver so you can be lazy and stretch out the changes to 10-15k otherwise mineral OEM is perfect.