My fiesta 1.6 has run more than 10500 kms since it was bought 8 months back. I checked the oil now and it is kind of rusty brown in color and is less viscous. What is the best oil for fiesta? Right now the engine is harsh when accelarting hard in any gear. I drive mostly within the city especially in urban areas where I don't cross 3rd gear mostly.I read this thread and still couldn’t come to a conclusion. Please suggest one good oil that I can switch to.
Any oil API-SL/SM in my view, preferably the latter. See the grade specified. Theoretically using the lightest oil should give you marginally better economy. As for semi- or full- synthetic it is a matter of choice. In any case you must follow the recommendations of the manufacturer otherwise it may affect your warranty.
I have never used synthetic in my Santro. Reason is very simple - I barely do 7000-8000km per annum on it. My standard oil is Castrol Magnatec.
Advantage annual oil change, as against semi-annual with a semi-synth / mineral. Again this car will be doing no more than 8-10k per annum. I agree that cost wise a semi-synth twice a year is cheaper.
I may add that while the Honda is a high revving engine, and may benefit from a synth the Santro engine is a typical mid-to-low spec engine, so mineral or semi-synth is good enough.
Thanks, fair points.
The only thing that keeps me thinking is that the 4 speed AT box behaviour, which is high revving to an extent by default.
It essentially stays in 3rd gear right upto 60+ kmph. Which means the revs (altho there is no Tacho) at this speed on 3rd gear would be upwards of 3000 rpm is what I am guessing, which is higher than what we drive the manual transmission cars at (around 2k).
Hence was wondering if synthetic may be good here. But I guess Castrol M would be good enough for now, not to meantion a whole lot cheaper !
For a lower mileage chap - like me just 10,000 or once a year with any good semi-synth should be Ok. Look for API-SM in petrol oils. You can even find this is pure mineral oils! I cannot justify the extra cost of a full synth.