Black Sludge and Toyota/Lexus

[ghosthunter]

is it better for me to just use mineral oils and oil change every 5,000 km?

typical na byahe per week ay 4x sta rosa laguna - alabang, 1x sta rosa - pasig.

bihira lang na ma stuck in heavy traffic.

I would suggest every 5,000km as a precaution on your specific model of car.

Or sell it off and get another car with less issues.