Service vehicle soon(need better OBD2 Reader)

[Rocky33]

hello guys ,i know service vehicle soon does not mean it needs service but there is something wrong somewhere although my service is due in 2 months and oil life is around 10 percent ,First i thought it was due to oil but i reset oil but it still appears say once in say 2 days,i am worried something has failed or is failing ,car drives normal ,i have used obd 2 reader with torque pro app but it is showing no fault codes,i am using Vgate icar 2 OBD2 reader which is a decent one and has helped locating fault codes many times but this time it seems it needs a more advanced reader to solve the puzzle ,I was planning to service my car next month but due to this fault either i have to take to garage now or i buy a better reader to know if there is some serious fault which needs urgent attention.i will appreciate if someone can direct me to link where i can buy good obd2 reader .I have searched opcom but there are so many fakes around,not sure if they will work .
Thank you Guys.