Oil Viscosity not in the manual ...

[StockEngine]

Motor Oil 11 - Chapter One - Operating Temperatures and Viscosity - Bob is the Oil Guy

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[oj88]

You should be ok with a 5W or 10W40 oil.

[StockEngine]

You should be ok with a 5W or 10W40 oil.

and even with a 0w40

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[Dezaremos]

and even with a 0w40

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I wanted to try a 5w30 kasi .. Will it be ok with my engine ??

[WallyWest]

I wanted to try a 5w30 kasi .. Will it be ok with my engine ??

If 10w30 is in your owner's manual then 5w30 or 0w30 is also ok. What's important is the "30".

[StockEngine]

I wanted to try a 5w30 kasi .. Will it be ok with my engine ??

very similar to the 10w30 honda oil you used. don't worry much...

[Dezaremos]

very similar to the 10w30 honda oil you used. don't worry much...

Don't have the manual when I bought it 2nd hand .. But I googled the 4afe engines used in Corollas abroad and it stated that the recommended viscosity is 10w30 or 10w40 ...

But those viscosities are from other countries, I don't know if its applicable here in the philippines tropical climate ...

Unlike your Honda, it is really widely known that 10w30 is the recommended oil viscosity ...

[StockEngine]

which specific 5w30 are you eyeing? we can check the PDS and see kV values...

[Lew_Alcindor]

If I were you, I'd use 40 instead of 30. The number beside "W" doesnt matter in our country, AFAIK.

[JCPR20]

If I were you, I'd use 40 instead of 30. The number beside "W" doesnt matter in our country, AFAIK.

I would also go for 40 in your case where the car is 20YO. 5w or 10w I believe would not matter unless you live in baguio between the months of dec to feb when the temperature go below 10c. . .and only 'sometimes'

[Dezaremos]

If I were you, I'd use 40 instead of 30. The number beside "W" doesnt matter in our country, AFAIK.

Why 30 ???

Is it not advisable in our country ?? why does honda and vios recommend 5w30 in their manual ??

4afe in pakistan, miami, arizona etc all use 10w30 ..

[oj88]

and even with a 0w40

Personally... and it's just my opinion... a 20 y/o vehicle will probably be better off with a 5W-xx or 10W-xx. Reason being, the engine might actually benefit from a relatively thicker oil at cold start because part tolerances have presumably loosened up enough that an 0W oil may no longer provide enough initial protection.

Note also that motor oil takes a lot more time to warm up and reach the target viscosity. By comparison, the coolant temperature warms up significantly faster thanks to the thermostat valve, which can reach operating temp in about 5 minutes. Motor oil, however, could take anywhere around 15-20 minutes to reach normal operating temp. In other words, the oil might stay in the lower end of the viscosity range far longer than necessary.

Anyway, I'm just splitting hairs.

[StockEngine]

Personally... and it's just my opinion... a 20 y/o vehicle will probably be better off with a 5W-xx or 10W-xx. Reason being, the engine might actually benefit from a relatively thicker oil at cold start because part tolerances have presumably loosened up enough that an 0W oil may no longer provide enough initial protection.

Note also that motor oil takes a lot more time to warm up and reach the target viscosity. By comparison, the coolant temperature warms up significantly faster thanks to the thermostat valve, which can reach operating temp in about 5 minutes. Motor oil, however, could take anywhere around 15-20 minutes to reach normal operating temp. In other words, the oil might stay in the lower end of the viscosity range far longer than necessary.

Anyway, I'm just splitting hairs.

hardly any difference at 40C for 5w30 and 0w40, 72.8 and 75 cSt respectively

Mobil 1 New Life™ 0W-40

Mobil 1™ ESP Formula 5W-30