refer this: https://forum.lowyat.net/index.php?showtopi...post&p=67489690

the red shirts are shell guys, so yeah, Pennzoil and Shell are working together on this.
40 years in the making.

natural gas base stock would be group V, catch all of all other base stocks

oic, ok,

do we have 5w-30 SHU in our shores? i dont tink so, all 5w40 only right

from paultan, looks like no. and i want 0w20

i m going to get PU 5w-20, that should be good enuf for me

Petrocanada got 0w20 and 5w20 in both fully synthetic and synthetic-like category.
100% made in Canada.

Feel free to browse local distributor website@ http://www.pclube.com.my/synthetic.php

This post has been edited by chemistry101: May 25 2014, 12:11 AM

TBN is a bit on the low side, and i don't see HTHS numbers

Hi guys, my Corolla SEG just underwent a top haul and im considering what EO to put in for its oil change. My mech recommended fully syn xw40 since he said i drive long distance and the engine doesnt consume oil. Im a lil skeptical bout it. Was contemplating 10 w 40 LM, but id like to hear feedback coz i noticed oils now have really extended OCI's . Btw i just got this car. Tq....

Did the mechanic bore the engine cylinder walls or is it just changing basic stuff such as the piston rings?

If he just change piston rings = mineral, semi or fully syn and change when reached 1000km.
If he rebores/sleeves the cylinder walls = mineral oil. Recommended to change the engine oil again after a short distance. Also using mineral. Then after 1000km you can use any type of engine oils.

Btw I am using LM 10w40. Satisfied with it.

just the basic stuff. No re boring or sleeving done. I see i see. Ill take note on the 1000 km immediate change. Im just curious if an old engine like the corolla can still run on fully syn? Im pretty sure to use 10w40 LM, but cant help wondering.

After my overhauling, my seg also use fully syn 5w40. No problem at all even at high revv.

What is the average TBN for PCMO?

Ah cool cool. An SEG user. All the better. Any recommended fully syn oils? Those with good protection etc?

what's PCMO? either way go read the respect tech specs/data sheets manufacturers provide.

Passenger car motor oil.. Normally the HDEO (heavy duty diesel engine oil) will have higher TBN and HTHS.

Liqui Moly MoS2 10w-40 mention nothing on this value http://www.liqui-moly.de/liquimoly/mediend...2010W-40_EN.pdf

This post has been edited by pumpman: May 26 2014, 02:47 PM

for good/reputable API SN/GF5 certified fully synthetics, it will be in the range of 8-13.

Hope you can enlighten us what are the oils brand and model with this value..

Torco value seems bad? http://www.torcousa.com/technology/TDS_SR-1%20MotorOil.pdf
http://www.torcousa.com/technology/TDS_SR-5R%20Racing.pdf

not the be all end all though
considering torco's performance/racing oriented products, torco has a ton of friction modifiers to make up for what's low on the TBN.

And BITOG forumers has UOA that reports that their TBN doesn't deteriorate as fast as other EO.
i have also personally used torco on 16k km OCI, which had no performance degradation whatsoever.

my own personal take (again, imho) for petro canada is that they aren't well known in the boutique EO, and they are basically mainstream albeit for canadian petrol stations hence the name petrol canada.

IMHO TBN is to neutralise the acid from the combustion by-product, not relevant to friction modifier...forgive me if i am wrong

This post has been edited by pumpman: May 26 2014, 03:28 PM

yeap you are correct: http://en.wikipedia.org/wiki/Total_Base_Number

the idea is having better friction modifiers (or whatever proprietary additives) an EO has it's effect on more efficient engine operation would reduce the consumption of TBN.

else there would be no explanation to the UOA that BITOG members are submitting on various performance/racing based engine oils such as the 300v that motul has which only has barely 8 TBN http://www.motul.com/system/product_descri....pdf?1329125318 and still able to survive 10-20k km easily despite being a full fledged non api certified racing engine oil.

Sorry i cannot agree with TBN 8-13 as API guidelines is between 6.1 to 8.3 http://www.pqiamerica.com/March2013PCMO/lucassynth.htm. I personally agree Racing oil is not govern by API