Probably better to ask in the car sub forum bro.

If you are going 45-60k km a year, then branded fully synthetic at 10k+ km.
All your wear and tear parts must be monitored. Gear box oil, brake/steering fluid, timing belt, the whole long story la. Dont skimp if ur driving it that much a year.

I recommend checking groupon(and such sites) for the car wash+wax combos thats like RM40-60. great value.