how to drain oil properly

[badkuk]

share your techniques naman. i've seen some auto shops use an air compressor to flush out the oil; i've heard some people letting the oil drain overnight para siguradong ubos.

[pitbullz]

drain overnight then flush with new oil. you can also save the flushed oil since its still clean anyway...1 litre would do.

[Shadetree MKNX]

drain overnight then flush with new oil. you can also save the flushed oil since its still clean anyway...1 litre would do.

If the flushed oil is clean why bother flushing it?

I usually dont bother "flushing" the remaining oil out of my engine. I change my engine's oil regularly and I doubt if the 1/8 cup of old oil is going to shorten the lifespan of the 3-4 quarts of fresh oil in a 3-month period.

Besides, some people only change their filters ever other oil change, and they don't seem to notice any problems.

[speedyfix]

try not to use compressed air. flushing should also only be used kapag madami na buildup inside the engine (buo buo na yung oil), since it contains petroleum which can eat away at the oil seals.

[zechs]

ah masama pala na binubugahan ng compressed air when draining? didnt know that, next time di ko napapagawa yun. just drain until none is left.

[badkuk]

sir speedyfix, curious lang...nakakasama po ba ung compressed air?

[rsnald]

run your engine until oil temp starts to rise. Or you can drive around your neighborhood until the oil temp rises to its normal temperature as indicated by your temperature gauge. Heating the oil makes it less viscous, or more fluid, so it flows out easily. drain with the oil lid open to prevent vacuum effect. pag konting tulo na lang ng oil, remove the oil filter (make sure na masasahod mo yung tatapon na oil from the filter). No need to blow with compressed air. Compressed air tends to have some moisture since compressing air condenses the water vapor inside the ballast tank of the compressor making the pressurized air moist. Moisture is bad for your engine internals, it may cause serious corrosion problems.

pag totally ubos na yung oil, (which will take about an hour only if you started with a warm engine/warm oil), re-insert the oil pan nut and put new oil filters then refill with new oil. hth ;)

[mikey177]

Thanks for that explanation about the dangers of using compressed air, rsnald. One of the problems though if one is having an oil change at a gas station is that the supervisors usually want to make the process as fast as possible (more customers, more money), so they would insist that the mechanics use compressed air to speed things up.

Kanina nga nagpa-oil change ako sa Caltex dito sa amin, gusto pang gamitan ng flushing oil yung makina ko, buti na lang pinigilan ko sya.

[buknoy2002]

try not to use compressed air. flushing should also only be used kapag madami na buildup inside the engine (buo buo na yung oil), since it contains petroleum which can eat away at the oil seals.

sir speedy

question

do all flushing oils have pertroleum? i remember reading before that caltex power flushing oil dont have petroleum, hence safe to use. though its not recomended every 5k. every 10k lang daw

[speedyfix]

i'm not sure about all but most do i think. there is no real need to use it naman unless super sama na ng condition. the only reason that gas stations try to encourage it's use is because it will add to the sale and move their products.