When to change oil

[Retz]

^

Sir ung Top1 hindi un talaga FS oil. Kaya every 5K-7K change oil. The rest every 3K-5K OCI.

[the_wildthing]

I usually go with what the user manual states. It also provides additional guidelines if the car is driven hard, or driven in a lot of traffic, or pulling heavy loads. Usually more often. One of mine says every 5k mi. or 6 mos. for mineral oil, 10k mi. or 12 mos. for synthetic, the other is 5k mi or 12 mos. mineral only, 15w40.

[motoring guy]

Change oil only when they are dirty and sticky, there is no hard rule in changing oil. Remember that oil only prevent the friction of engine metals and so they gather dust and some engine residue that is why you change them. I myself have been using cars of different brands for almost 20 years and sometimes I change oil a year or a year and a half only when it is dirty & sticky. Your engine has a filter to keep it clean and the dirt that accumulates that cannot be filtered are the ones that mix with the oil. Changing oil every 5000 km was the marketing strategy of oil companies to keep them selling and they just heat or scrub the oil to purify it and then sell it to us again.....

[dr. d]

if i can heat and scrub the oil to purify it at reasonable cost and effort so i can re-use it, i'd do it, too.

[Jiggs]

I tend to agree....but the irony of it even the oil company doesn't really adhere to that frequent oil change...my Take on this is these we're all overly blown out by this marketing people..siemfpre Sales comes first. They even came up with some high falluting terminologies just to sell their oils. I have worked to diff. Oil company na and all of them follow the oil test results and not the 6 months/yearly change of lubricants. Their internal combustion engines sometimes reach 3 years before an oil change...siemfpre Merton sila ng routine oil sampling and from there they based their maintenance strategy. And that's using mineral oil.

[bmacavanza]

baka car manufacturer not the oil compnay.

[jaymd]

daily drivers every 3- 6 mos. pag garage queen once a year

[Retz]

meron din mga cheap alternative na FS oil. since na mura lang, change oil sila every 5k even with FS oil.

[nashimoto]

ako once a year lang.. every december karga semi synthetic.. kpg may 13th month lang

[ali_diego]

ako once a year lang.. every december karga semi synthetic.. kpg may 13th month lang

hahahaha...like na like brad...:D

[viraccat]

Pareho tayo. about 2,500km lang per year ang natatkbo car ko.

[RC-V]

ako once a year lang.. every december karga semi synthetic.. kpg may 13th month lang

ako once a year din, fully synthetic naman.

[kajjo1]

appreciate the inputs.....thanks!!!!!!

[Retz]

^

no worries sir. and remember that frequent short trips a day less than 10km considered as harsh driving condition din un..... kaya mas early ang OCI.

[rukawa11]

Change oil only when they are dirty and sticky, there is no hard rule in changing oil. Remember that oil only prevent the friction of engine metals and so they gather dust and some engine residue that is why you change them. I myself have been using cars of different brands for almost 20 years and sometimes I change oil a year or a year and a half only when it is dirty & sticky. Your engine has a filter to keep it clean and the dirt that accumulates that cannot be filtered are the ones that mix with the oil. Changing oil every 5000 km was the marketing strategy of oil companies to keep them selling and they just heat or scrub the oil to purify it and then sell it to us again.....

right ...

[Wh1stl3r]

According to CEPA (California Environmental Protection Agency) citing from different sources like Caterpillar, Chevron, Cummins, etc. Oil should be changed when it reaches the following limits:

Physical/Chemical
Viscosity (cSt * 100C) +/-25%
TBN 50% to 2

Contaminants
Soot (% wt) 3
Water (% vol) 0.1 to 0.5
Fuel (% vol) 2.5 to 5%
Glycol (% vol) 0

Wear Metals (ppm)
Iron 75 to 150
Aluminum 15 to 40
Chromium 15 to 40
Copper 20 to 50
Lead 30 to 100
Tin 18 to 25
Nickel 10
Silicon 15 to 25
Sodium 30 to 50
Potassium 40

All compared to a virgin oil sample.

I think this is a more measurable way to tell whether an oil has reached the end of its service life. In my UOA although the oil is pretty dark, it tells me I should be more worried about the viscosity loss.

[jmpet626]

Thanks po sa mga replies. I stocked up naman ng RP Oil and filters nang hihinayang lang ako kasi di ko na maximize yung extended oil change intervals niya. Try ko nga magpa UOA dun sa nakita ko sa other thread about mobil 1 UOA.

[kajjo1]

Thanks, Retz