Kingdemu:
Nawao...[s] How I come tek be the OP again? Well, make una settle una issue I don commot for here[/s].

SerikinGamo:


I live in Nigeria and there's nothing like summer here

erico2k2:

The joke is on you mate who claims there is summer in NIGERIA!
9ja has Raining(Wet) and the Dry season, I dont know where you get this your wanna be abroad mentality of Summer from, The west have Summer/Winter/Autom, so you my friend must be extreemly Ignorant! the average temp in 9ja at its lowest is like 20, which is summer for us!

erico2k2:

Bro no offence,I cant drive a peugeot of any model!me preference! talk BMW, Audis and |Range rovers, we are game!

erico2k2:

Seriously, Ok what chart are you talking about? meanwhile howcome we drive the same car in Poland and same car in Nigeria and the same Oil specification is required for car lub? My RRS is 5W30, the same with my Guy in Russia which is meant to be colder? If you do not know the meaning of Elacticity and think it is limited to elastic as per rubber then you have no busniness arguing in anything to do with tech!

Kingdemu:
Nawao... How I come tek be the OP again? Well, make una settle una issue I don commot for here.

erico2k2:
lubish

timenamoney:
bo bo juice , see as u dey call big big motor name ,na the Peugeot them use give you example of car with oil temperature gauge , ok for me to believe u send me 2007 range front bumper to PH

9icetoo:
So according to op, we should all be using SAE 40 or SAE 50 oils. Nigeria has only one weather, hot. Rarely ever drops below 20 degrees celsius except in the northern parts at nightfall or in the high mountains ranges like obudu at nightfall.

Well, whoever thinks he ought to go with the op against the manufacturer s advice only has himself to blame when the inevitable occurs.

40 weight oil in engines made with very high tolerances and even tinier oil galleries and plumbing. I just shudder at the thought of the stress and wear going on in those engines.

5w30 is a goal for my rides. Hasn't failed yet.

timenamoney:
the chart am talking about is the ambient temperature table diagram chart that show -13 <-------------5w30-------->+38

the only thing I have learned from you is that oil is elactic after some research base on its process of changing viscosity

erico2k2:

Oh ok you thought I was chatting shyte right? FYI Im a fluid Mechanic .

timenamoney:
wait before you start bragging I never told you that I don't know oils change viscosity , our argument is using the word elasticity to describe oil , which I I came back here to identify with you is right
looking through this trend you never identify your wrong concept and ideology about cars actually having oil temperature gauge or contributing any meaningful answer via when oil temp go above 100degr in hot temp or it viscosity then for better protection despite you never having the equipment know or having idea about it at all , which means your not here to learn or communicate properly , even after asking which chart , I presented demo oil ambient temperature chart table which can be seen in most 2001 backward or forward car manual , with out any single comments towards that
my manual 1999 Camry say use 5w or 10w-30 and also gave an oil ambient temp chart table which say 30w at engine operating Temp 100deg can accommodate or function up to +38 ambient (out side temp) ,
<-1-2-3 -------------5w30----------+38> maximum

what happened when you reside above up to +45 environment or when oil temp increase above it idea temp 100deg up to 108 , what will be 30w viscosity then to better protect the engine ?

9icetoo:
So according to op, we should all be using SAE 40 or SAE 50 oils. Nigeria has only one weather, hot. Rarely ever drops below 20 degrees celsius except in the northern parts at nightfall or in the high mountains ranges like obudu at nightfall.

Well, whoever thinks he ought to go with the op against the manufacturer s advice only has himself to blame when the inevitable occurs.

40 weight oil in engines made with very high tolerances and even tinier oil galleries and plumbing. I just shudder at the thought of the stress and wear going on in those engines.

5w30 is a goal for my rides. Hasn't failed yet.

timenamoney:
I am here to learn and to share my thoughts and experience

many in various trends are saying our ambient +43 degree temps don't matter and have no effect on oil, that car with radiator regulates engine temperature and also help to bring the engine oil up to operating Temp 100 degree through the help of the themostat , asking if our weather is hotter than engine temperature 100deg

there's is also a clear statement by oil manufacturer saying in 5w30 , 5w is the low temperature weight while 30w is the oil weight in 100 degree , which is also the engine coolant temp range,

on different occasions during summer , you find out that oil temperature gauge move above 100 degree , (which they claim the oil get to 30w at operating Temp) to +44 ,+46 and above .

my question is....

1)what viscosity will 30w oil be in 106 degree engine oil temperature during summer ? ( = it will be lower than 30w VISCOSITY which will not lubricate the engine properly and course more wear and tear).

2) why does engine manufacturer display ambient temperature oil chart which shows that 30w arrows to +38 degree and BELOW , when they know that it is suitable for ALL temperature?

with the above ideology I wish to prove to you that 40w mostly or 50w oils may be the best choice for +44 or higher temperature and severe load condition, and will not harm our engine, (and 30w is for state's with +38 and below temperature ) the only disadvantage is less fuel economy , but with synthetic, flow will be better.

pls guys what is your engine oil temperature gauge reading during hot summer?

what your take in my view?

REMEMBER TIME NA MONEY

ZIMDRILL:


its very simple

1 nowadays oils are multi grades meaning there are still very efficiant at both low temperature and operating temperature

2 The most worry is at cold start, where oil can be thicken by cold therefore multiple grade that is still efficeint at cold based given value eg 5w-30

3 Whether summer or winter once operating temperature has been reached, the oil temperature would be also controlled by the coolant and air (based on the design of the oil sump/pan)
some car have an oil cooler where oil gets cooled by coolant

So oil temperature gets also regulated by coolant remember coolant is there to cool the engine therefore oil tempe gets cooled/controlled


4 your confusion is on the last digits eg 5w(40) the 40 doesnt represent ambient temperature but it represent oil viscosit @ operating temperature therefore according the grades they use to measure oil viscosit at operating temperature its put into that 40 category

So the most import number is 1st digit/s 5W in our case as this when the engine is vulnerable, if the oil is thick at cold start it wont flow quick and fast enough at cold therefore the engine gets damaged or worn out soon over time

5 Have you ever wondered why whether its in Seberia, Alaska or Saraha, Namibi desert when the operating temperature as been reached, the engine maintain the operating temperature irregardless of its ambient temperature be it -20 degrees Seberia winter or 35 degrees Namibi

timenamoney:
1) is this the only technical answer u have towards this trend ?
2)do know what engine oil temperature gauge is, have any car or equipment that has it or don't have any idea about it like eriko deos
3)are we discussing recommended oil here ?
4) did you ever attend a social club or understand communication properly ?
my only answers towards oil viscosity is when told it doesn't matter with out pointing towards multiple question I asked with out any technical explanation, not according to me telling anyone to use 40w oil which you are negatively painting, what I asked is that 5w30 at engine operating temperature (100deg ) is 30w, which oil temperature is supposed to be 100deg too, what happens when engine oil temp gauge exceed 100deg (during hot out side temp) up to 108deg engine oil temp and what viscosity 30w will be then for better protection , if you don't have any technical answer pls arbort

please note

as for me I use 5w or 10w30 in my 1999 Camry because my state ambient temperature (out side temperature) is below +38 deg which is the Max ambient temperature 30w oils can accommodate during engine operating Temp 100deg and will never use 5w30 above >+38 up to +45 ambient (out side temp)
<-3------5w30----->+38 maximum
<-7---------20w40--------------------+45
<-7---------20w50------------------------------50
<-5---------10w30---->+38
<-0---------0w30------>+38
( anticipated ambient temperature) found in most manuals like mine for my model with out mentioning synthetic or mineral oil ,
according to my manual and maybe not all car manual pls note.
it a fuel economy vs better protection vibe and remember oil loss it viscosity after some duration of operation

remember time na money

9icetoo:

1. Let's get one thing straight first.
Viscosity: this is defined as a fluids resistance to flow. Bear this in mind.
Now certain manufacturers have designed their engines in line with the flow characteristics and shear resistance of the recommended engine oils.
Granted, thicker (more viscous) oils offer better protection from shearing experienced at higher temperatures (above 100 degrees c) but there is a limit. I will address that later.
Thinner oils (less viscous) offer more protection at startup and more fuel economy. Mind, wear and tear occurs more at startups than any other time (except for engines operating at high rpms ie racing).
2. I know what engine oil temperature gauge is. Did you just discover it?
Most cars dont have it. If they needed all it, the manufacturers would have installed it. Oil temperatures inside an engine varies. From the cylinder wall to the bottom of the piston, to the journals of the crankshaft. The oils here are hotter than the oil in your crankcase where the oil temperature is measured and fed to your instrument cluster. Engine manufacturers are more interested in oil pressures(flow) than oil temperatures. A very thick (viscous) oil may generate lower pressure (reason why the winter grades were created) leading to premature engine wear. Very thin oils may also struggle to generate sufficient pressures (reason why viscosity modifiers were added) leading to engine wear at high rpms.
3. We are not discussing recommended oil but it's also good to go with recommended unless you are using your car for special applications or modifying it. In that case you use what suits your application. Again, you consult the oem. If they can't advise, you bite the bullet. What you see is what you get.
4. Don't be stupid. I will leave it at that.

Now to add to 1 above(I said I will get to that),
You need to understand that oils and engines have advanced from what they were 60 years ago.
Oil is also a coolant. It is actually your oil that takes away heat from your cylinder walls (water jacket does this too), piston, crankshaft, camshaft, connecting rods etc. This waste heat is transfered to the block where the coolant takes it away. For the oil to do this effectively, it needs to be thin enough to flow through these tiny crevices and galleries, lubricate them in turn, withstand shearing, thinning and maintain sufficient pressure in the oil pump.
When an oil is too thick, the oil pump has to work harder to get it through the tiny galleries and crevices (differential pressure is what creates flow). When the pump (designed for less viscous fluid) works too hard to pump a more viscous fluid two things happen 1. The wear and tear on the pump increases. 2. The differential pressure generated by the pump is reduced. Recall I mentioned that differential pressure is what creates flow and by extension lubrication. (If you still don't get it, well, I tried.
So by using a very thick oil, you rob your engine of 1. Coolant and 2. Lubrication.

Lastly, viscosity is not the only parameter to consider when choosing the engine oil for a car. You also have to consider the API rating. SN and above apply for newer cars. I think SM for engines below 2002. This has an even bigger bearing on the longevity of your engine.

Car manufacturers have worked with oil producers to develop these oils and the operating conditions were taken into consideration. Even 50 degree celsius ambient temp was considered because they know that there's the death valley in usa and people drive there! These new oils with improved base oils and additives have viscosity indexes high enough to protect engines at both extremes of temperatures. The higher the VI, the less effect high temperature will have on the viscosity.

I am sure the oil manufacturers also considered temperatures as high as the 108 degrees celsius you see on your gauge because I know the temperature between your crankshaft and your main bearings is higher than 120 degrees celsius.