OW-40 or 5W-30

[hytan]

Which of the two engine oil rating has the best protection under Philippine road condition?

Both will be Fully Synthetic in nature...

[mazdamazda]

depends on your engine. check your user's manual for the optimal oil weight to be used in your car.

for example, the the rav4 1.8L 1zz-fe engine's optimal oil is a 5w-30. while the rav4 2.0L 1az-fe engine's optimal oil is 10w-40.

to determine your the optimal oil, check which oil has the broadest / widest coverage of temperatures. though you can safely rule off temperatures of below 0 deg C here in our country.

[BlueBimmer]

i'd go for 5w30 or 10w50 if available. mainit dito kaya di syado recommended low viscosity oil afaik.

[hytan]

Mazdamazda, My ride is an altis 1.6 3zz-fe. Im planning to get Mobil1 Supersyn 0w-40 or Castrol Syntec 5w-30. Dont know which of the two is better. Both will be Fully Synthetic in nature.

Which will you choose?

[jackaroo]

Aside from what was mentioned above, you can ask what the toyota dealers use for synthetic oil. Think the toyota synth oil is a 5w40.
My suggestion is to use a 5w40 or 5w50 or 10w30 full synth. Don't think castrol Syntec is a true "full synth" oil based on comments from the oil forums.

[speedyfix]

mobil 1 0w-40 is excellent oil!

2 thumbs up!

[mazdamazda]

Mazdamazda, My ride is an altis 1.6 3zz-fe. Im planning to get Mobil1 Supersyn 0w-40 or Castrol Syntec 5w-30. Dont know which of the two is better. Both will be Fully Synthetic in nature.

Which will you choose?

5w-30 a full synthetic? better check it out... it might be a semi-synth only.

if you want better gas consumption - i'd go with the 5w-30. i think that the zz series engine is designed to handle 5w-30 (unlike the az series).

but if you plan on keeping your ride for a LONG time, go with the mobil1 0w-40 (what am using right now). toyota shaw-ortigas uses that kind of full-synth oil.

[hytan]

I'll be using Mobil1 sa ZZ engine ko. Mas may tiwala ako kay Mobil1 0W-40 rather than Havoline Energy 5W-30 because im planning to use my car a long time.

[JCsE46]

Here's some excellent accurate information about oil:

http://forum.e46fanatics.com/showthr...ighlight=0w-40

I would recommended Mobil 1 "0w-40".

[KCboy]

i use 5w40 for my diesel 2.5 pajero? mobil 1, u think its ok?

[jackaroo]

Here are some mobil 1 product data sheets:
5w50:
http://www.mobil.com/Australia-Engli...bil1_5W-50.asp
0w40:
http://www.mobil.com/Australia-Engli...bil1_0W-40.asp

Note the higher HTHS figure(high temp, high shear) of the 5w50 mix