May 25 2022, 11:12 AM
QUOTE(homicidal85 @ May 25 2022, 09:58 AM)
tl;dr version:
accidentally bought and used monograde petronas mach 5 SAE 40 in iswara.
what are likely adverse effects of this?
i recently serviced my old iswara (1998). I usually buy my own engine oil coz my mechanic doesnt stock the brand of oil I want.
in the past, i always use magnatec 10W40 for this iswara but my mechanic recently told me its too thin to protect my old engine so he recommended i switch to mineral oil - petronas mach 5 specifically.
so i went and bought a petronas mach 5 engine oil. since this is the first time im buying mach 5, i didnt really check properly what i bought.
turns out, i accidentally bought the monograde version, SAE 40. i only discovered it while i am preparing to buy another canister for my next service.
to be honest, i am quite happy with the oil, the car started fine and the engine runs cooler and smoother with less vibration than before which was a surprise to me. seems like a good move from magnatec to mach 5 monograde EO for an old magma engine.
but i am a bit apprehensive that my engine is not getting the protection it needs during morning starts. is this really a valid concern or is SAE 40 actually perfectly fine to use in Malaysia?
Those multi-grade are meant for a range of temperature. Many people instead of more common 15W-40, 10W-40 even go for much more expensive 0W-40. The W stands for Winter or cold temp. The lower the number the colder the temp. When it is cold the oil gets thicker. So, the grade 40 oil will become like 50 or higher thus it is heavy to crank the engine and the oil may not flow easily to protect the engine. So, using multi-grade, you can assume that the oil is like grade 15 when cold (when engine start) and to back to behaving like grade 40 once engine reach normal temp.accidentally bought and used monograde petronas mach 5 SAE 40 in iswara.
what are likely adverse effects of this?
i recently serviced my old iswara (1998). I usually buy my own engine oil coz my mechanic doesnt stock the brand of oil I want.
in the past, i always use magnatec 10W40 for this iswara but my mechanic recently told me its too thin to protect my old engine so he recommended i switch to mineral oil - petronas mach 5 specifically.
so i went and bought a petronas mach 5 engine oil. since this is the first time im buying mach 5, i didnt really check properly what i bought.
turns out, i accidentally bought the monograde version, SAE 40. i only discovered it while i am preparing to buy another canister for my next service.
to be honest, i am quite happy with the oil, the car started fine and the engine runs cooler and smoother with less vibration than before which was a surprise to me. seems like a good move from magnatec to mach 5 monograde EO for an old magma engine.
but i am a bit apprehensive that my engine is not getting the protection it needs during morning starts. is this really a valid concern or is SAE 40 actually perfectly fine to use in Malaysia?
In Malaysia, we do not have that big temp fluctuation. So, mono-grade is just fine and save you money as well.
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