What I can say is SL is just less environment friendly than its successor. Performance wise won't differ much.

Just sharing....
API SM and SN only allow maximum phosphorus content of 800ppm, where API SL allows maximum of 1000ppm.

Even though API SL has higher phosphorus content (anti wear agent), it does not mean it would provide better wear protection.
API SM and SN have better wear control property, allowable average cam wear (ASTM D6891) is maximum 90 micron comparing to API SL's 120 micron.


*Phosphorus is a substance which would "poison" catalytic converter, engineers found out that higher content of phosphorus in oil will reduce working life of catalyic converter.

hi guys..anyone here have use M7 PRO OIL 10W-40 ( USA SEMI SYNTHETICS) engine oil?..

can share experience/review here...

thinking to try it on my next OCI...

now using LM MOS2 10w 40...

http://www.m7shop.com/Category/Engine-Oil/...Synthetic).aspx

This post has been edited by samfisher: Mar 23 2015, 12:17 PM

Purely Malaysian brand, nothing about it is USA, and it doesn't have proper certifications.

really?

i thought its from USA...guess i stick with LM...

what is LM?

Liqui Moly

any good?

-delete duplicated-

This post has been edited by t1231: Mar 24 2015, 10:44 AM

-delete duplicated-

This post has been edited by t1231: Mar 24 2015, 10:41 AM

ya.

feel free to google/search through lyn for more details/feedback

Going for my first service this thursday. Btw, it's true that my friend said for auto or cvt car use semi synthetic eo & fully synthetic eo was for manual.



This post has been edited by far1470: Mar 24 2015, 01:46 PM

no.

tell your friend to fly kite.

haha. tq2.

was intend to use fully synthetic before my friend tell me about that. Maybe he didn't know or someone told him before to use semi synthetic for his auto car. make me confuse a bit.

Aiyo... read the first page and determine for yourself what is right and what is not la. It's like asking "Coke is for 20+ year olds only whilst beer is for 30+ year olds". That's not true anymore, even younger folks are drinking hard liquor (questionable btw) and old folks can drink coke. It doesn't matter. The question is which one is better for you? Can you afford it? That's it.

Doesn't matter what it is, your car will still run even with mineral oil, semi synthethic or fully synthethic
It's just a matter of preference and affordability

i'll appreciate opinions on my situation here. my car has 176k km on the clock. it's a 1.8T audi engine with k03 turbo (not Tsi). been using LM semi 10w30 but last service i changed to pennzoil fully 5w40.i dont drive much these days but i notice after 3-4 days the car sitting still, theres a lot of smoke from the exhaust upon startup and lasts about 20-30 secs.is it a bad sign or has it anything to do with switching the oil?

disregarding the smoke issue, i've been contemplating to switching again to 5w30 full syn.maybe mobil 1.thought lower viscosity will be better since i almost never rev past 3k rpm

exhaust moisture/water condensation, should be nothing to do with engine oil.

revving have little to do with lower viscosity engine oils especially when you're using good/reputable oils.
case in point, do dig my youtube videos and look up what engine oil viscosity i've used

it got me a little worried because i read sometime back that when the engine is not running the oil slowly dripping through worn valve seals into the combustion chamberand accumulated on the pistons.upon startup this oil got burned hence the smoke.using oil that is too light might amplify this.

i thought it does.higher rev,higher stress,higher temperature,oil gets lighter..no?in my mind,at most i only be driving at 3k rpm,where the car already at 150km/h.at such rev, the turbo might not get hot enough to require xw40 oil.yes the turbo is oil cooled.another point to take into consideration

If that is the case, then monitor your engine oil levels more frequently and top up if needed.
i would still stick with the viscosity the manufacturer/manual originally recommended. (which more modern engines, xw20/xw30 is very common)

that would be old thinking, feel free to look/read up the resources i've compiled on the first page, and again, my google plus/youtube links would have additional/interesting materials pertaining your particular concern of revving and engine oil viscosities

understandably turbo charged cars do get hotter and may thin oils too light, hence it will still come back down to manufacturer's recommendations.
example: Mitsubishi Evolution X recommends xw30, while the non turbo Lancers are recommended on xw20, which is what i am using