Is 5w-30 OK? For Vitz in summers?

[haseeb.basharat]

Do you know toyota imc has also taken approval of toyota taglon 5w50 from Toyota japan? Toyota japan doesn’t make oil itself. I lab tested this oil from my car after 5k kms. Turns out to be the worse choice of oil I could ever had. How can dealerships make money if you don’t go to them? I don’t say honda oils are bad, but 0w20 isn’t a good choice when you consider bad fuel, climatic conditions and pollution.
US got great fuel quality and great environment. We don’t have that.
Im not saying you cannot drive on 0w20, but in long term and mileage like 300,000kms. 0w20 isn’t a choice. 5w30 is the right choice for that.

Why am I using mobil 1 5w50 than? Well, i know two people and seen their cars personally. Both are 2012 corolla altis 1.6, one is at 450k kms and another one is at 370k kms without any engine overhaul. Both are using the same oil with 10k drain intervals.

[rajaatta]

are you serious about the low Visc oils Man you then should had studies the new engine designs first these cheap JP engines are designed to us the low visc oils 0W-20 as their piston rings clearances and con and main rods bearing clearances are too thin that using a visc oil can easily shoot up the engine resulting in damaged and engine oil consumption problem.....
every single vehicle which came to me for diagnostic's had the same issue caused by the cheap high visc oils.
I had sawn many Vitz 1KR-FE series engines gulping up the engine oil because of the high visc and temp terminology.
i my self rebuild these cheap engines and always uses the 0w-20 throughout the winter's and summers BUT REMEMBER IN PAKISTAN ALWAYS USE A QUALITY ENGINE OIL NOT THE CHEAP OILS LIKE ZIC AND LOCAL MANUFACTURED OILS BRANDS

[asgharpwr]

http://www.hendonpub.com/resources/article_archive/results/details?id=3965

[crude101]

and what exactly is a quality engine oil ? bahar ka bana hua ?

[haseeb.basharat]

There is a difference between a cheap high viscosity oil and a good branded well tested high viscosity oil.
Well I’m 100% sure about it. Give me data that low viscosity oil such as 0w20 will avoid wear and shear in Pakistani conditions as compared to Mobil 1 5w50, and i’ll quit pakwheels.
You use amsoil 0w20 whole winter/summers, that’s whole lot of different league, and you know that. People here are picking up bottle of Honda 0w20 and bringing it up right next to Mobil 1, LM or amsoil.

Engines are messed up also by using fake oils, i drove and sold my gli at 220k kms driven on toyota 20w50. It never gave me any issue. I’m sure about it on the base of personal experience. 1krfe has common problem of eating oil.
@Thinking vitz was eating oil on low viscosity oil, but running fine on toyota taglon 5w50. FYI: that temperature terminology is a part of physics known as “thermodynamics”
Japan engines might have this, but 5w50 is the viscosity grade recommended by toyota indus motor company Pakistan for corolla, for vitz 5w30 is fine.

[TM]

BUT REMEMBER IN PAKISTAN ALWAYS USE A QUALITY ENGINE OIL NOT THE CHEAP OILS LIKE ZIC AND LOCAL MANUFACTURED OILS BRANDS

Ummm which oils are 'A Quality Engine Oil'?

You have simply put a question mark on the quality of ZIC, any proof that is not worth putting in a car engine... and what exactly you mean by 'local manufactured oils brands'... are you talking about Shell, Total etc?

Sorry for asking so many questions... but clarity for naive members like me would be very much appreciated.

[haseeb.basharat]

Read comments, and people are commenting on basis of their experience.

[crude101]

sir A quality engine oils are those "jo bahar se hotay hue samandar paar se aate hein". zic total shell pso yahan pe bantay hein tau woh theek nai. reason : kyon ke woh yahan bantay hein dalda ki cooking oil refinery mein

[haseeb.basharat]

Na bro, main problem is r&d, they’re not bad, they’re good oils, but like you can’t compare general eurostar tyre with michelins: same is the case here.
You can run whatever you like, just make sure the oil you’re pouring isn’t fake.

[crude101]

Hasseb bhai I was being sarcastic. Agreed 100%

[tintin1]

There is a difference between a cheap high viscosity oil and a good branded well tested high viscosity oil. Well I’m 100% sure about it. Give me data that low viscosity oil such as 0w20 will avoid wear and shear in Pakistani conditions as compared to Mobil 1 5w50, and i’ll quit pakwheels. You use amsoil 0w20 whole winter/summers, that’s whole lot of different league, and you know that. People here are picking up bottle of Honda 0w20 and bringing it up right next to Mobil 1, LM or amsoil.

Well, in your last few post you repeatedly mentioned your satisfaction about 5w-50.

Ok, what if your engine oil needs cst less than 15 at 100'C, then will you be using xW-50 in your car ?
If so, then it would be no wise decision at all.

The 2nd number in viscosity is 50, which means at high temperature the oil will NOT be thin enough. Means will remain more viscose. Means more resistance to flow.

Now technically in the hot summer (when engine is already working at high temps.), you should give it low viscose oil so that it work smooth & easy. You are feeding it xW-50 which means you are giving tough time to work.

No one uses 20w-50 oil in USA, Australia, etc. Because the oil does not get thin enough at high temp and gives hard time for engine to work.

But in Asia & Africa people are using this oil (20w-50) because it will take some time to understand. And its also one of the reasons here Cars visit workshops more often.

[haseeb.basharat]

One question only from you. If its giving my car tough time than how come acceleration and fuel economy is optimum?
12-13 within city
15-16 on motorway 120km/h
17ish on highway 100km/h

[basitali87]

I bought a carton (6 packs of 3L each, Total 18 Litres) of ZIC A+ 5w-20 from the very same Pakistan Oil Store, in last week of December, 2018 and it costed me 11,800 PKR (1966.67 PKR for each 3L pack). I guess, market price is quite high.

Had a Simply amazing experience with the Store, the staff and especially owners are very helpful, friendly and educated.

Thank you @tintin1 for guiding about and recommending such a wonderful oil store!

[rajaahmed96]

Bro it won’t either die by using on 5W30. Its your choice to keep using 5W50.

[ammad368]

@haseeb.basharat bro from where purchase that mobil 1 oil ?
Are there any authorized dealers in pakistan ?

[Xulfiqar]

The viscosity of your engine oil has been determined by the manufacturer itself, The design of the oil pump, the clearances of the bearings, piston skirt to wall etc. etc. all are taken into consideration. Using a way too thick oil can show you good oil pressure but this also means that you have a limited volume of oil flowing "through" stuff - (this is where the oil is being used as coolant)

too thick an oil can literally tear apart the film its making (unless your oil is blended such - e.g. european spec BMW LL or MB spec LL oils) - even then you are limited on the top end of the viscosity range, e.g. BMW 10W60 oil is a killer if used in their regular passenger car engines other than their M (motorsport) range - they literally specify against it.

Honda, Toyota, Mazda etc. have specced a very light oil to be used in their engines (new camry is filled with 0W16 oil) - because they have built it so, they have a slightly larger sump to aid in cooling and slightly tighter clearances - this makes for most power delivered to the driveline without wasting it. (same reason BMW now use variable volume oil pumps and electric water pumps now). On the regular I see fleets of these cars that are run like hired donkeys and one engine oil charge is replaced at 10,000 miles - the engines are top notch fantastic. I wonder why they dont simply die running in south texas or the texas panhandle. - If you want a solid comparison, lets to to miami - where the humidity is like breathing underwater, fuel quality is so poor that it has twigs in it and weather so hot that you can die within 10 minutes under the sun. Old chevy and fords here run cheap 5w30 (chevy/ford quality is LOL)

if you are so worried about the viscosity - why dont you use a thicker gear oil in your automatic transmission or power steering etc?

[haseeb.basharat]

http://www.mal.com.pk/all-pakistan-distributer

[haseeb.basharat]

if you are so worried about the viscosity - why dont you use a thicker gear oil in your automatic transmission or power steering etc?

Does transmission have any contact with outside environment? No pollutants and bad fuel relation with transmission oil. Already using idemitsu blended toyota cvt fe transmission oil. Power steering is already eps.
Does US have high level of pollution, dust and bad fuel quality? Temperature alone isn’t the sole factor on which you can decide engine oil viscosity.
I’m already saying the same, viscosity of engine oil is recommended by manufacturer, and toyota pakistan is recommending 5w50 for corolla. People here are recommending on the basis of toyota japan which is wrong.

[Xulfiqar]

that "strange crank noise" is not from the crank if it disappeared after an oil and filter change.

The oil filter has a drain back valve, It can be faulty too - I think you have forgotten that the old biyassi corolla (82 corolla) would do its thudding/drumming startup if you used a cheap oil filter on it. With branded oil filter it would have a silent start.

[haseeb.basharat]

Sir never had a chance to drive this old corolla. My first car was indus corolla 2.0D limited