Japanese oil pumps are pretty much bulletproof.
I've been running my original FA50 oil pump for almost 12 years , without a single problem .
I like the convenience of filling my oil tank a couple of times a year , rather than having to mix oil with every tank of gas . That really seems like an added pain . Having to carry oil and a measuring cup ...
But , I guess you have to have something to do while you pump a half-gallon of gas . ;)