Good morning to you all, I was reading a thread on engine oil meant for Toyota corolla, and I found out that the correct engine oil specification is SAE 5W-30. I ve been using total quartz 5000 for servicing for almost a year now which is 20W50. My question is if i revert to the normal oil specification [5W-30],would there be any potential damage or effect on the car engine?.
Note; the car is Toyota corolla S, 04. Thank you, response from the professionals; gazzuz, honmusa and other experienced auto gurus. Anticipating your response.

geovidal:
Good morning to you all, I was reading a thread on engine oil meant for Toyota corolla, and I found out that the correct engine oil specification is SAE 5W-30. I ve been using total quartz 5000 for servicing for almost a year now which is 20W50. My question is if i revert to the normal oil specification [5W-30],would there be any potential damage or effect on the car engine?.
Note; the car is Toyota corolla S, 04. Thank you, response from the professionals; gazzuz, honmusa and other experienced auto gurus. Anticipating your response.

Depending on the extent of tear and wear damage the 20w50 will have done to your engine piston ring and main bearing. Do a compression test to verify if your cylinder compression is still intact before go ahead to change cos if your piston rings are already worn and you go ahead with the 5w30 which is lighter, your engine will be shorting oil .
Contact my signature if you are in Lagos if you need to conduct this test.

honmusa:

Depending on the extent of tear and wear damage the 20w50 will have done to your engine piston ring and main bearing. Do a compression test to verify if your cylinder compression is still intact before go ahead to change cos if your piston rings are already worn and you go ahead with the 5w30 which is lighter, your engine will be shorting oil .
Contact my signature if you are in Lagos if you need to conduct this test.

thank you for the response. It's unfortunate that my location is Ilorin. What do you suggest.

geovidal:
thank you for the response. It's unfortunate that my location is Ilorin. What do you suggest.

call my no ,I can put your through some test procedure.

honmusa:

call my no ,I can put your through some test procedure.

OK thanks, I will call you soon

I equally have same issue but I don't have your contact

Greyowl:
I equally have same issue but I don't have your contact

08061166316

Hello Which Engine oil is good for Golf 3

honmusa:

Depending on the extent of tear and wear damage the 20w50 will have done to your engine piston ring and main bearing. Do a compression test to verify if your cylinder compression is still intact before go ahead to change cos if your piston rings are already worn and you go ahead with the 5w30 which is lighter, your engine will be shorting oil .
Contact my signature if you are in Lagos if you need to conduct this test.

So 20w50 damages the engine? Interesting