tama si sir *ry_tower.. Best ang 5w-30.. huwag 0w...
Maganda sana yung Caltex havoline FS Energy kaso ewan bakit obsolete na. Wala na rin ako nakikita na bagong stocks nito. I use it on the avanza.
Havoline Energy 5w30 - Bob Is The Oil Guy kahit sa BITOG sikat yan kasi very high quality oil.
If hindi na mahanp yan, Shell Helix Ultra na lang IMO or itong bago ng caltex.
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For local use the number before the W is largely irrelevant. It's the number AFTER the W that's important. 30-weight is fine, 40-weight is okay too - especially if you use the vehicle in heavy effort/high-load circumstances.
20-weight oils are strictly fuel-saving oils - if you're not stressing the engine out I suppose they're fine, but I'd personally err on the side of caution and specify at least a 30-weight oil.
Why do you suppose Mobil 1 0W-40 is so expensive? You're really paying for its jack-of-all-trades multigrade viscosity - it'll flow very quickly around your engine in a freezing cold start and it'll thicken nicely to a tropical-friendly viscosity when it's hot.