Changing Engine Oil Grade in my Corolla Altis 1.6 2018 from 5w30 to 10w30

[pwuser158913575038]

Well, whats an ustad who doesn't experiment on peoples cars??

[anon35615524]

you can hop onto 5w40 or 5w50

After 5w-30, the next engine oil grade closest to 5w-30 is 10w-30. It must be the 1st choice.

If it also gets reduced, then one may switch to 5w-40, and then 10w-40.

5w-50 may be the last resort. Its twice as thick as 5w-30, and even 10w-30 (if kinematic viscosity is taken as the criteria for oil thickness).

[anon35615524]

30 hazar k bad 20w50 daal len or coolant ki jaga pani use kren. Coolant radiator pipes khrab krdeta h.

Again... Fatiha and INNA LILLAH for that mechanic too.

[alibintahir]

Really helpful. Thank you.

[anon35615524]

I am not an expert. It may work, but still, the risk may not be taken, and this practice may be avoided.

If brands are same, both are fully synthetic (or semi synthetic, etc. i.e. composition process is the same), both meet the same API / ILSAC, etc. criteria, then these may be mixed, but still, lots of risks are involved.

Experts can guide better...

[alibintahir]

So I think rather their experiencing with risks, it's the best option to buy 5w30 once and for all, rather than mixing it with just 0.2 liters of 10w30, still looking for some expert opinion on this if someone can help, though your suggestion is very well noted.

[anon35615524]

If you are in big cities, then instead of getting the oils changed from dealerships / stealerships, its best to have the oil changed from the oil change shops on Petrol pumps, and from the drums (if warranty issues are not there).

[arshad_12]

All Toyota 3S dealerships recommend just 10w30 petron plus or 20w50 petron,I don't know why But to everyone, whatever the mileage of the car.

[alibintahir]

Yes, that's exactly what happened to me really, they just gave me the choice of two oil grades 10w30 Petron plus or 20w50 petron, to which on the suggestion of the ustaad jee, I opted for 10w30 petron plus. Do you have any idea, what might be the reason behind it going totally against what is recommended in the Owner's manual of Corolla, that is, 5w30?

[anon35615524]

Just the usual myths and suni sunai baatein from their ustaads; and without any logic, proof, study, etc.

[mgalaxy3]

0w20.

If not, 5w30 max.

[arshad_12]

I think because their profits are high in these simple mineral oil and people trust them too much and people have very little knowledge about oil, Toyota dealerships are pouring the same oil into cars that have just only 8k or 10k km.

[alibintahir]

Yup, that's why I have asked from the experts here and from next oil change onward, I'll stick with 5w30 fully synthetic oil in sha ALLAH.

[mkd2549]

5w 30 fully synthetic is best option as long as engine is in good condition. You can continue it even after 100k kms and oil level can be checked at regular intervals. When engine start consuming oil and oil level drops from minimum level before time then more viscous oils either 5w 40 fully synthetic or 10w 30 fully synthetic can be used whatever gives you better mileage and efficiency.

[alibintahir]

@mkd2549 Thank you, from next oil change onward, I'll be sticking to fully synthetic 5w30 as Alhamdolillah condition of the engine of my Altis is just like new, so it's not fair to start using a more viscous 10w30 for now.

[pwuser160034082662]

Hi i have 1.6 altis

[pwuser160034082662]

Hey i have 1.6 altis 6speed 2011 model its 115k driven ,i just bought this car the previous owner was using zic 10w 40 and the engine had too much sludge from inside I flushed and started using 5w 30 carient but the oil is reduced .5 ltr on 3k kms please suggest what to do next

[Hassan1991]

That's normal. Keep using 5w30.

[pwuser15467761328]

I have toyota corolla grande 2018 model from 50k kms to 95k kms 20w50 has been used can i shift it back to 10w30 what are the pros and cons?

[SER_GTR]