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Is it safe to use 100% synthetic #5190894 08/19/19 02:16 AM
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Espada Offline OP
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I have a Mitsubishi lancer 1997 model with 1300cc engine which broke down at 250000 KM and started consuming oil so i rebuilt it and changed all the broken parts and started using 20w50 oil cause i live in Egypt which has temperatures that requires such viscosity as per the car manual, i have been using mineral oil rated API/SL and it says i should change it every 5000km but i change it at 3000km with filter on each change and i always flush the old oil but then i started searching for oils and differences between them and found out that 100% synthetic gives much better protection in high heats and crank start, now the question is can i change to Amsoil 20w50 premium protection as its the only synthetic with 20w50 in Egypt and change it every 10000km cause i dont want to keep any type of oil for long as the terrain here is rough and 80% is city driving with lots of speed pumps and traffic and of course the air conditioner is always on and 20% is traveling with full car and full luggage, i have uploaded the data sheet of the oil i am using now.

Sorry for the long post and thanks in advance for anyone who will help but i am very cautious after my engine has been rebuilt cause of my ignorance it was broken in the first place cause i used a monograde oil which caused the damage cause i didn't knew about the difference.

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Re: Is it safe to use 100% synthetic [Re: Espada] #5190898 08/19/19 02:36 AM
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What is the price difference between the two oil? Dino/mineral/conventional vs. Amsoil in your country?
That may help the answer!

btw, lots of cars in the world run on conventional oil ... I'm guessing most cars in the world are running conventional. I'm running conventional right now in 3 out of 4 cars ... lol

Re: Is it safe to use 100% synthetic [Re: OilUzer] #5190905 08/19/19 03:25 AM
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Espada Offline OP
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Originally Posted by OilUzer
What is the price difference between the two oil? Dino/mineral/conventional vs. Amsoil in your country?
That may help the answer!

btw, lots of cars in the world run on conventional oil ... I'm guessing most cars in the world are running conventional. I'm running conventional right now in 3 out of 4 cars ... lol


Mineral costs 205 EGP Amsoil cost 700 EGP but cost isn't the issue here i am talking about the best oil for my car

Re: Is it safe to use 100% synthetic [Re: Espada] #5190906 08/19/19 03:27 AM
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Mad_Hatter Offline
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Are Castrol, Mobil or Shell not available in your area? They've gotta be cheaper than Amsoil. (Amsoil's a fine oil, it's just costly)

What are your low(est) temps? Can you run a straight (mono) grade suitable for Egypt??.. that might give you more options.

Re: Is it safe to use 100% synthetic [Re: Espada] #5190907 08/19/19 03:31 AM
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Originally Posted by Espada
Originally Posted by OilUzer
What is the price difference between the two oil? Dino/mineral/conventional vs. Amsoil in your country?
That may help the answer!

btw, lots of cars in the world run on conventional oil ... I'm guessing most cars in the world are running conventional. I'm running conventional right now in 3 out of 4 cars ... lol


Mineral costs 205 EGP Amsoil cost 700 EGP but cost isn't the issue here i am talking about the best oil for my car

Your changing the oil out every 10k km, a lot of oils besides Amsoil will work fine. But if you have your heart set on Amsoil...go for it.

As for going from mineral to full syn, the first couple changes should be short (maybe 5~6k km?) because the full syn can clean out any sludge and you don't want that clogging up small oil passages, filter, pick up.. etc.

Re: Is it safe to use 100% synthetic [Re: Mad_Hatter] #5190909 08/19/19 03:41 AM
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Espada Offline OP
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Originally Posted by Mad_Hatter
Originally Posted by Espada
Originally Posted by OilUzer
What is the price difference between the two oil? Dino/mineral/conventional vs. Amsoil in your country?
That may help the answer!

btw, lots of cars in the world run on conventional oil ... I'm guessing most cars in the world are running conventional. I'm running conventional right now in 3 out of 4 cars ... lol


Mineral costs 205 EGP Amsoil cost 700 EGP but cost isn't the issue here i am talking about the best oil for my car

Your changing the oil out every 10k km, a lot of oils besides Amsoil will work fine. But if you have your heart set on Amsoil...go for it.

As for going from mineral to full syn, the first couple changes should be short (maybe 5~6k km?) because the full syn can clean out any sludge and you don't want that clogging up small oil passages, filter, pick up.. etc.


The only 100% synthetic oil in Egypt that comes in 20w50 is Amsoil all the other brands have light viscosity, the temps in Egypt are very high in summer reaches 50 Celsius sometimes but mostly 30-40 Celsius and never ever has it dropped below 0 as in winter it goes to 10 Celsius

Re: Is it safe to use 100% synthetic [Re: Espada] #5190912 08/19/19 03:53 AM
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Originally Posted by Espada

The only 100% synthetic oil in Egypt that comes in 20w50 is Amsoil all the other brands have light viscosity, the temps in Egypt are very high in summer reaches 50 Celsius sometimes but mostly 30-40 Celsius and never ever has it dropped below 0 as in winter it goes to 10 Celsius

Can you get a full synthetic straight grade, since your low temps don't go below 0c? If my temps didn't get cold like they do, I'd run an SAE30 all day everyday and twice on Sundays!😂.. If not, sounds like you got a handle on things and Amsoil it is (weird that no other Xw50 is available🤔..but oh well).


Last edited by Mad_Hatter; 08/19/19 03:59 AM.
Re: Is it safe to use 100% synthetic [Re: Mad_Hatter] #5190916 08/19/19 03:57 AM
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Espada Offline OP
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Originally Posted by Mad_Hatter
Originally Posted by Espada

The only 100% synthetic oil in Egypt that comes in 20w50 is Amsoil all the other brands have light viscosity, the temps in Egypt are very high in summer reaches 50 Celsius sometimes but mostly 30-40 Celsius and never ever has it dropped below 0 as in winter it goes to 10 Celsius

Can you get a full synthetic straight grade, since your low temps don't go below 0c? If not, sounds like you got a handle on things and Amsoil it is (weird that no other Xw50 is available🤔..but oh well).



Closet thing i found was a semi-synthetic brand mannol 15w50, if i am flushing engine every oil change and i will flush again and switch to Amsoil how long to run it to be on safe side and keep in mind dust and traffic here is insane

Re: Is it safe to use 100% synthetic [Re: Espada] #5190918 08/19/19 04:08 AM
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Originally Posted by Espada
Originally Posted by Mad_Hatter
Originally Posted by Espada

The only 100% synthetic oil in Egypt that comes in 20w50 is Amsoil all the other brands have light viscosity, the temps in Egypt are very high in summer reaches 50 Celsius sometimes but mostly 30-40 Celsius and never ever has it dropped below 0 as in winter it goes to 10 Celsius

Can you get a full synthetic straight grade, since your low temps don't go below 0c? If not, sounds like you got a handle on things and Amsoil it is (weird that no other Xw50 is available🤔..but oh well).



Closet thing i found was a semi-synthetic brand mannol 15w50, if i am flushing engine every oil change and i will flush again and switch to Amsoil how long to run it to be on safe side and keep in mind dust and traffic here is insane

If dust and particulates are a big problem, I hope you're paying as much attention to the filtering efficiency of both your air and oil filter. Particulates will ruin an oil, even Amsoil, quickly. Causing all sorts of problems. That said, I'm not in the best position to tell you how long to run your first couple oil changes.. that's something for you to decide. But in general they should be on the shorter side at least for the next couple changes to prevent that sludge issue... maybe 5km??That sounds prudent unless someone else has something to add. This is what I would do if switching over to a full syn after the engines been on a steady diet of mineral oil for some time. This is also recommend by oil mfgs.

Btw, when you say "flushes" are you meaning to say a chemical flush is done or are you just saying that the entire crankcase is drained???

Last edited by Mad_Hatter; 08/19/19 04:08 AM.
Re: Is it safe to use 100% synthetic [Re: Espada] #5190919 08/19/19 04:08 AM
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Originally Posted by Espada
Originally Posted by OilUzer
What is the price difference between the two oil? Dino/mineral/conventional vs. Amsoil in your country?
That may help the answer!

btw, lots of cars in the world run on conventional oil ... I'm guessing most cars in the world are running conventional. I'm running conventional right now in 3 out of 4 cars ... lol


Mineral costs 205 EGP Amsoil cost 700 EGP but cost isn't the issue here i am talking about the best oil for my car


if cost is not an issue ... Then let's assume that both oil are free and/or exact same price.
Under that assumption, I would use Amsoil over ANY mineral/conventional.

As far as syn being safe, it depends on what you mean by safe? I have a 1997 car (same year as yours) and it burns oil with syn or syn-blend but not with dino. Yours is a rebuilt so you may not have that same problem! I've also read that some say to use dino to break-in a rebuilt engine. I am sure experts will chime in.

Re: Is it safe to use 100% synthetic [Re: OilUzer] #5190923 08/19/19 04:13 AM
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Originally Posted by OilUzer

if cost is not an issue ... Then let's assume that both oil are free and/or exact same price.
Under that assumption, I would use Amsoil over ANY mineral/conventional.

Agreed..if money is not a factor, the OP could easily do worse than running Amsoil.

Re: Is it safe to use 100% synthetic [Re: Espada] #5190926 08/19/19 04:36 AM
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My car model is 1997 but engine was rebuilt 20000km ago i have been running 20w50 mineral oil since then and by flushing i mean that i add a bottle of engine flush before changing oil and filter and run it on idle for 15 mints to prevent any deposits from staying behind and to make new oil run better and since i knew about the benefits and how much better synthetic oil is i wanna give it a try but i never had an experience with it before and for air filter i change it every 7000km to be safe even if its good to go

Re: Is it safe to use 100% synthetic [Re: Espada] #5190937 08/19/19 05:19 AM
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I'd be using the best oil filter I could get my hands on too...why spend all that money on oil if you're gonna use a cheap filter when the filter is arguably as important as the oil being used... You don't think using a chemical flush every oil change is a bit excessive? I have no idea what kind of flush you're using but some can use harsh solvents and I'd be worried about subjecting rubber seals to the flush so often. Seems to me if you're changing the oil regularly and more frequently, not less while using a high efficiency oil and air filter that chemical flushes every oil change shouldn't be necessary every oil change. But that's just me...

Fwiw, I'm not trying to beat you up about your routine, it sounds like you're more knowledgeable than the avg person.. I'm just trying to get a better handle on why you're doing a couple things.

Last edited by Mad_Hatter; 08/19/19 05:23 AM.
Re: Is it safe to use 100% synthetic [Re: Espada] #5190942 08/19/19 05:24 AM
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Originally Posted by Espada
My car model is 1997 but engine was rebuilt 20000km ago i have been running 20w50 mineral oil since then and by flushing i mean that i add a bottle of engine flush before changing oil and filter and run it on idle for 15 mints to prevent any deposits from staying behind and to make new oil run better and since i knew about the benefits and how much better synthetic oil is i wanna give it a try but i never had an experience with it before and for air filter i change it every 7000km to be safe even if its good to go

Sounds to me like you might be killing it with kindness with that flush at every oil change.


God Bless Our Troops

Re: Is it safe to use 100% synthetic [Re: demarpaint] #5190943 08/19/19 05:28 AM
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Originally Posted by demarpaint
Originally Posted by Espada
My car model is 1997 but engine was rebuilt 20000km ago i have been running 20w50 mineral oil since then and by flushing i mean that i add a bottle of engine flush before changing oil and filter and run it on idle for 15 mints to prevent any deposits from staying behind and to make new oil run better and since i knew about the benefits and how much better synthetic oil is i wanna give it a try but i never had an experience with it before and for air filter i change it every 7000km to be safe even if its good to go

Sounds to me like you might be killing it with kindness with that flush at every oil change.

Right! I'd be servicing the oil on a severe service schedule if particulates are that big of an issue. Oils cheap, engines aren't.

(run a full dino or syn blend and change it out every 5k miles.. and spare the engine the flushes..but again, that's just me)

Last edited by Mad_Hatter; 08/19/19 05:30 AM.
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