Motor Oil

**OTEP** · April 2nd, 2005 09:08 PM

The filter and the oil are supposed to work together. The filter can only catch the larger impurities. It is the oil's task to trap the smaller ones that easily make it throught the filter media.

**jackaroo** · April 3rd, 2005 12:30 AM

Although "w" is for winter rating, it also shows how fast the oil will flow when the engine is cold. The modern engine needs an oil that's thin when cold but can take heat under normal operating temp. The "normal" 20w50 oil is a bit too thick to be fuel efficient so most manuf suggest a 10w30 or 15w40 for normal use.

Diesel engines produce a lot of soot, carbon which can increase oil viscosity, even in synthetic oil, inspite of quality oil filters. Only an oil analysis can determine if the oil is still usable or not after 5k kms. So wout using oil analysis, still safer to change at 5k km.

**jasonub** · April 3rd, 2005 12:32 AM

your right but the main use of oil is lubrication reduction of friction

then to cool

then as a cleansing agent

then as a rust and corrosion arrestor

then as seal or cusion

Did you know that there are 3 types of oil and not 2 for our engine?

Mineral oil
AD or ashless dispersant oil
and then syntethic oil

do what you believe.

Im just passing my knowledge to those who are open minded. I deleted my post in suggesting to extend oil change. Those who want to know just do a search on the internet on syntetic oils and contact the manufacturers.

**jackaroo** · April 3rd, 2005 12:43 AM

I don't think anyone here is questioning your beliefs in oil, so take it easy. We're just sharing our individual experiences, never personal in nature.

**imprezawrxsti** · April 3rd, 2005 01:15 AM

Mobil Semi Synthetic

**KCboy** · April 3rd, 2005 07:24 PM

can any1 explain the number sa oil? me, i use mobile 1 5w50. what does 5 n 50 mean? higher the number, the cheaper the oil? btw, my ride is a 95 4d56 tdi.

**jasonub** · April 4th, 2005 12:38 AM

Originally Posted by jackaroo

I don't think anyone here is questioning your beliefs in oil, so take it easy. We're just sharing our individual experiences, never personal in nature.

Ok noted. its not a belief though its 10 years working as a service and parts manager and training in different countries for different manufacturers. Anyway ill keep quiet now.

**OTEP** · April 4th, 2005 12:53 AM

This is a forum, no one takes things personally. We are just here to exchange ideas.

And yes, saturated oil has less lubricity than 'clean' oil.

**raine** · April 5th, 2005 12:26 AM

What property oil oil ang represent nang API . Dati gamit ko CASTROL GTX API SL. notice ko during starting engine cold rpm at 1500 at pag nagwarm na 1000rpm. pagnagrev ako without moving ang engine rpm bumabaksak sa 500rpm unti-unting pupunta sa 1000rpm. And kanina nagpa change oil ako ng VALVOLINE API SG as per other reply mas lower grade yata ito. pero ng mag start ako engine still cold rpm sa 1000rpm lang, at pagka warm na balik na sa 800rpm. pag rev without moving di na bumabagsak until500rpm punta na kagad sa 800rpm. PArang naging magpino ang takbo ng engine. Maybe mascompatible ang engine ko sa API SG than API SL. Ano ba ang nererepresent ng API rating? API SL more thick than SG or thin? more avail kasi ngayon oil API SL na kaasi ito yata ang highest API rating ngayon?

**Supierreman** · April 5th, 2005 01:07 AM

raine,
as for the idling nagpalit ka din ba ng sparkplugs nung nag SG oil ka na? most likely fouled na siguro yung plugs mo nnong naka SL ka. wala kinalaman API rating dun.

check this out about API ratings: (scroll down to see the chart)
http://www.chris-longhurst.com/carbi...oil_bible.html
I think meron na mas mataas na rating kaysa SL napost dati sa HCP pero di pa naka print sa mga locally available oils.