Quote Originally Posted by bloowolf View Post
Kung mineral based oil every 5k. Pero synthetics every 10k talaga. Yung iba nga dito umaabot ng 15k, but with the benefit of lab viscosity testing. I wouldn't do this myself. It is just comforting to know that modern oils are capable of maintaining their viscosity over a longer period, hence protecting the engine.
Based on experience sir saka turo nang uncle ko na head nang maintenance sa isang malaking construction firm.

1. Let your engine breathe. Meaning do not top up to full. Ex. My engine requires 3.2liters of oil sa manual. I only put in 3liters. Been doing that since 2007 when i learned of this. No issues until now my engine runs great!

2. Change oil religiously at 5k kms or 6months whichever comes first.irregardless of the kind of oil. Our climate here and driving conditions are extreme. The life blood of any engine is the oil. Microscopic dust we cannot see with the naked eye are all in our engines. They suck these pollutants/dust in the air through the intake. No matter how good your air filter still plenty gets through it. Snythetic oils are far superior than mineral oils but still it will get dirty. Dirty oils in our engine turns with the engines internals. When the piston rings,bearings and other rotating parts do their job the pollutants in the oil acts like abrasives running in between the internal parts of our engine. Just take a little but of used oils between your fingers and try to feel the abrasives when you rub it against your other finger and just imagine what it will do to your engine moving parts when you drive. Goin 100's or rpm to thousands.

The mineral oils and synthetic oils are both good though the latter is better. You can actually feel the difference when you jump from mineral to synthetic but as long as you change both at the same schedule your engine will be just fine!