QUOTE(Fubar20 @ Jul 14 2012, 01:42 PM)

Bro, I dunno what you been eating for breakfast but it smell like crap from here. Seems like drugs to me.
Multigrade oil doesn't mean it will cover a whole range of grade.
SAE30 will have LOWER viscosity at 100 degrees (engine operating temperature) than a SAE50.
To said that SAE50 will perform as SAE 30/40 when driving "normally", doesn't happen at the normal operating temperature or whatever temperature.
http://www.upmpg.com/tech_articles/motoroil_viscosity/Yup, Bro, me probably hallucinating...
Tech data aside, a simple layman's understanding... a multigrade oil eg 10W30 (grade yu preferred) is thinner when cold eg 10W and thicker when hot eg 30.
And the ideal "hot" is 100 deg C.
And all the viscosity changes are ctrl-ed by VI modifiers/improvers.
10W30 oil has less such VI modifiers than in 10W50.
Alwaz keep in mind our engines do NOT & kenot keep to "ideal" temp. True?
Esp under "harsher" conditions eg stop/start, high revving, faulty thermostats, coolant capabilities, etc..
There's also the shear component value of oils & deterioration of those VI thingey.
As such, a 10W50 oil wld offer better lube & protection than a 10W30, under similar higher temp conditions. Correct?
Also a 10W30 oil might degrade to 10W20 while similarly a 10w50 might be arnd 10W40?
That's why Fully Synthetics came into play...

Important point still : YOU decide...As long as YU happy....not really matter...REALLY!
ps. As Bro david so aptly put it : Wat's important is reg OCI & good filter performance.
Mineral, FF, FS...as long as w/in reco grades....all ok wan.
Agreed?

Added on July 14, 2012, 3:52 pmpps. If a Multigrade oil of 10W30 does not function as a MULTIgrade oil, wld it not be more practical & econ to use a MONOgrade SAE30 oil?

Added on July 14, 2012, 4:02 pmQUOTE(eqmal197 @ Jul 14 2012, 02:41 PM)
this morning go to PE to pay the rest of dpayment. SA inform us we can collect the car monday or tuesday
while waiting his manager to issue receipt, we had chit chat. on free give, got steering lock, tng card and tinted vaucher. SA also tell stories on some customers complaining leaking below engine. According to him, this is because each end of petrol hose that thighten to engine and tank is still smoot (lembut). so when put in full tank petrol, the air inside tank will create a high pressure and pushed through this hose, make the pengikat (sorry, dunno pronounce in english) a bit losen and causing leaking. he says when i get the car, dont fill up full tank. let it at least half tank so it won give air heavy pressure in tank. then dont fill full tank after use 1 or 2 week. then the thighten will become harder, thanks to engine heat
he also inform that when transfering from factory to sijangkang, there; only small amount of petrol that new car can go untill 1km. this lets the air trapped in tank. just in case they use these small amt of petrol for moving purpose
finally, waiting almost over
This is FIRST time me hear such an explanation re NEW cars!!!
Juz like plumbers talk abt GI water pipes will leak when juz fitted. Gotta wait till joints older then no leak oledi!
Haha!
Yup, wat plumber meant is he did NOT tighten/fit joint properly AND needs to wait for RUST to seal up joint!!!
In petrol piping case, feel it's clip/hose prob...
This post has been edited by zeone: Jul 14 2012, 04:04 PM