bahrain z28

hello there,

last time i used mobil1 10w-30 and to be honest i really like it but
since the weather has change here, it reaches 52 degrees celcuis
people say 10w-30 is not recommendable since the maximum temperature range for it is lower than 50c ...


i am thinking to go for 10w-40 but i dont have any idea which oil shall i use
please help because i really like the 10w-30

and is it necessary to change the oil type due to the temperature range?

P.S. in the owner manual of a 98 camaro it says "do not use other viscosity oils"

bahrain z28

c'mon guyz 80 views and no reply

HELP!!!

LS1121

iTrader: (17)

Probably because no one can answer. The inside of the engine far exceeds an ambient temp. of 120 F. I can't see how your Hot Weather would affect your oil, but I'm not a chemist.

blk97z28

iTrader: (3)

royal purple for me!

spy2520

iTrader: (3)

I'm thinking that 50*C is probably a maximum storage temperature considering the oil is probably a little hotter than that on a regular basis even in cold climates once the engine warms up.

LS6427

iTrader: (2)

You should be using 20w50.......period.

.

Grimes

iTrader: (3)

I say stick to the 10w30 . You can always get an oil cooler if the temps get too high, but i wouldnt run a thicker than spec oil on just speculation. Get a oil temp gauge if you are really worried

bahrain z28

any reason ??
everyone says 20w50 is not good for the engine

LS1121

iTrader: (17)

This is copy and paste from Mobil1's website.

“The Transsyberia Rally is a true test of a vehicle's ability to perform in extreme conditions,” said Jürgen Kern, Porsche Cayenne Transsyberia's team manager. “As we've done before, we turned to Mobil 1 fully synthetic engine oil.” Mobil 1's operating temperature range of -45C (-49F) to +200C (+392F) is ideal for high-performance, super-charged and turbo-charged vehicles like the Porsche Cayenne S. In fact, current Porsche models come factory-filled with Mobil 1.

Macwars

I think as LS1121 said that the hot weather is not such an issue ... the motor produce much more heat ( the problem could come then from the coolant system.. but that's another story ..)

For me what is important is the low temperature weather ... because there the oil is really at this temperature before starting the engine and this is a really important factor for the life of the engine to have the good oil !

So for someone who never has cold temperature .. it is not necessary to run on 0 W xx or 5 W xx oils ... a 10W xill be enough ...


just my own opinion ..

1 FMF

iTrader: (1)

yes, that's the whole ******* reason for different viscosity oils.


i installed an oil temp gauge on my 2002 and have the stock 195F thermostat soi can tell you firsthand even if you run a 160F thermostat that will have little effect on oil temperature. The degree to which the oil gets cooled depends on the temperature differential between the engine and outside air that is cooling it. In cool temps say 70F or less my oil temps will run 170-200F and not climb over 220F easily. this is because engine cooling is around 200F and with cold outside air oil temps are reasonably maintained. In summer when it's 90-95F out my oil temps are 170-220F and if i get in stop and go traffic and don't have airflow oil temps run 250F and higher. And it's worse when it is more humid.

The viscosity of an oil depends on it's temperature.
Most people don't know but optimum viscosity for minimal wear is 15-20 cSt and higher. The higher the viscosity the less efficient the oil pump is so you lose fuel economy. The only time a high viscosity is bad is when it is too high and the oil pump can't move the oil or the oil is too thick to be splash lubed and flow to areas then wear happens. The other thing that is important to know is when the oil gets very hot, oil viscosity goes down (gets thinner) and the oil pump loses volumetric efficiency- it pumps less oil than it normally would when the oil is colder and thicker. This is bad at 600-800 rpm idle when the motor is hot, your oil pressure drops and you have less oil being pumped, this is when you start wearing main crank bearings and camshaft bearings.

at 212F oil temperature, a 30 weight oil is 10 cst. A 40 weight oil is 15 cSt. a 50 weight oil is 20 cSt. As oil temperatures go over 212F the viscosity goes lower and increased wear happens for lower weight oils. Lower weight oils also tend to oxidize and burn off easier and leave deposits. this is the one area a synthetic oil makes sense as they will handle high temperatures better than conventional mineral oils. But oil temperature means everything, chances are you are running 220F and higher oil temps and you should be using a 50 weight oil such as 20w50, 15w50, or 5w50.

the 20w or 15w or 5w number represents the cold weather pumpability of the oil. lower number here is better for colder weather. A 5w50 will be able fine down to around 5F or lower i believe. a 15w down to around 20F I think. And i remember seeing conventional castrol 20w50 saying on the bottle do not use below 32F. Given your location, if you never have to start the car below 50F there is no reason you cannot use a conventional 20w50 or even a monograde sae 50. I think a monograde sae 40 is ok above 40F and a monograde 50 is 50F or 60F, that's how i remember it.

i also have the gm service manual and it's funny because they have 2 listings for oil recommendation which differs from the "owner's manual" and also proves the EPA CAFE bullshit. service manual shows a north america oil recommendation which is 5w30 for everything. for outside NA it recommends 10w-30 and 10w-40 based on temperature, so apparently location has some magical effect on oil. Africa/Asia hot is different than North America hot

1 FMF

iTrader: (1)

Mobil 1 fully synthetic oil has many different viscosities: 5w30, 10w40, 15w50. Very misleading advertisement as it makes no mention of correct viscosity range to use. if you wanted to run at -45C then you need a 0w20. if you wanted to run at +200C then you need one of the 50 oils or higher. It does not say they have one oil that fits -45C to +200C.

1 FMF

iTrader: (1)

because they are stupid and don't know what they are talking about.

used in the wrong conditions, yes it is bad for the engine.

using the recommended 5w30 in the wrong conditions is also not good for the engine.

LS1121

iTrader: (17)

[QUOTE=1 FMF;16522028]because they are stupid and don't know what they are talking about.

Ah yes, a man after my own heart.

bahrain z28

in winter the temperature is around 8C it never gets cooler than that
and in summer it is 48c outside today ..!!
soyou guyz think i should go for 20w-50 OR 10w-40 ??

Blk98Vert

iTrader: (2)

I prefer 5W-40, seems to be a good all around weight

1 FMF

iTrader: (1)

[QUOTE=LS1121;16523624]i did not mean that directed at you. it was to those who say that and when asked why their only response is it's printed in my owners manual.



for ambient temps around 48C or over 100F and knowing it won't be less than around 75F when you start the motor use a 20w-50 or an SAE 50. it depends on what's available locally unless you mail order.
Then for the time of year or when you know temps get down to around 8C (45F) then use a multigrade like 5w-40, 5w50 if available, or 15w40. For winter time if temps don't go near 48C then a 40 weight oil would be fine but if it still gets over 100F and you are stop&go then you really should use a 50 weight.

LS1121

iTrader: (17)

I did not copy and paste the entire article because it was rather long, but I guess the point is that outside temp really is not that big a deal for the OP. 10-30 would probably suite his needs. My friends in Vegas run it and have never had any complaints, it gets up to 112 often there. 50 weight probably for an old 283 that blows smoke. lol.

DisasterFormula

iTrader: (1)

Makes me mad b/c the 15W50 Mobil 1 is $8 a quart around here and I work for $8.50 an hour.

LS6427

iTrader: (2)

I just got 173,000 miles out of my fully built 427ci race engine. Thats unheard of........the engine looks BRAND NEW inside. If a rod didn't break finally the engine would run for another 173,000.

20w50 is all it ever got since day one. Castrol GTX cheap oil. That, along with an engine flush at every oil change using GUNK engine flush. NON-Synthetic, regular cheap *** oil. This whole bullshit oil argument will never end.....thats because companies know how to market and sucker in millions of people and making them think that we all need a super-duper, special synthetic oil. BULLSHIT..........

BOTTOM LINE:
The LSx engine is ABSOLUTELY NOTHING SPECIAL......its just another V8 engine. It has nothing special about it at all. All you need is $3.00/quart regular Castrol GTX 20w50 and a Purolator filter.
People that say 20w50 is bad for an LSx engine....sorry, they are IGNORANT.

You are throwing money in the garbage by buying all this synthetic crap and special oil filters. Change the oil and filter every 3,000......and thats ALL you can do to treat your engine well.

.