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January 9th, 2013 06:07 PM #31
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January 9th, 2013 06:58 PM #32Zinc is an anti-wear component in motor oil but it also kills the catalytic converter (which is a very expensive part to replace, btw). This is why zinc has been reduced iteratively in every subsequent API spec since SH. It is worthwhile to note also that the reduced levels of Zinc (and Phosphorous) affect older engines (with Flat tappets) more than it does newer engines.
On the other hand the current specification (SN) requires the highest level of the anti-wear component Molybdenum to date, which IMHO is all around better for new cars. Besides, you get the "Moly plating" effect which is more persistent than the straight up lubrication you get with zinc (which flows down with the oil when you turn the engine off). This makes it better for cold starts which is where lubrication additives matter most.
Actually, kinda think about it now, I wonder if the reduced valve tappet sound in my Tuc is because of the thinner oil viscosity or the move from SM to SN rated oil.
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January 9th, 2013 10:49 PM #33
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January 9th, 2013 11:04 PM #34
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January 9th, 2013 11:38 PM #35dati yata eh galing OWS (germany) yung HGMO
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dati yata eh galing OWS (germany) yung HGMO
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January 10th, 2013 12:41 PM #36I did analysis on my Tucson GLS 2.0 record, these are my FC stats over my recorded period from March 2012 to today:
10,728km on HGMO FS 10W-40
Isolated HWAY records - 2,484.7km 304.0L 8.17km/L
Isolated CITY records - 5,321.3km 1019.4L 5.22km/L
Unisolated mixed records - 2,922.0km 509.4L 5.74km/L
Computed mixed cycle - 32/68 h/c ratio 7806.0km 1323.4L 5.89km/L
TOTAL/AVERAGE - 10,728km 1832.76L 5.85km/L
There are also other stats on gas -
Petron Xtra is about 3.20% MORE efficient than XCS on the highway
Petron Xtra is about 0.68% LESS efficient than XCS in city driving
Petron Xtra is about 1.73% LESS efficient than XCS on a 32/68 mixed cycle
It costs P9.26 per km in fuel and P1.77 per km in maintenance (total of P11.03 per km) to operate the Tucson
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January 10th, 2013 03:25 PM #37^ eversince, i only used Shell Nitro+; except in Subic, using XCS (~ 4% of total fuel used for 6 months)
so the viscosity rating affects the health of the engine, right? 5w-40 better than 15w-50
while the API rating affects the FC, right? no diff between SN and SM
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^ eversince, i only used Shell Nitro+; except in Subic, using XCS (~ 4% of total fuel used for 6 months)
so the viscosity rating affects the health of the engine, right? 5w-40 better than 15w-50
while the API rating affects the FC, right? no diff between SN and SM
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January 10th, 2013 04:34 PM #38I think not as straight forward as that....
SAE rating (i.e. viscosity) i think would affect FC most noticeably (thinner is more efficient) but would also have a significant effect on engine health/lifespan. Too thick - and you damage your engine on cold starts, too thin, you damage the engine as it gets hot since there's not enough lubrication film between metal parts. For the Tucson Theta II at least: I would pick viscosity in this order:
0W-20 > 0W-30 > 5W-20 > 5W-30 > 10W-30 > 10W-40
I wouldn't put anything above 10W-40 (i.e. 15W-50) in my Tuc.
API tells you what additive contents are in the oil. Zinc, Moly, Phosporous, Boron, detergents and other stuff. You might need to research a bit to know the right API rating, especially if you have an older model car. I would say that SN is best for the Tuc Theta II - better than the SM. Then again, we live in the Philippines. My 89 corolla (that barely runs) would pass emissions tests with flying colors; it might make more practical sense to let the cat converter waste away with an SL or SJ rated oil and extend the engine's life longer with the greater ZDDP/ZDTP. content.
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January 12th, 2013 09:39 PM #39
Sir, anong sabi ng HQA, hindi ba void warranty mo nung nagdala ka ng sariling Oil? corkage fee? sino SA mo sir? thanks!
*I thought I'm the only one experiencing around 2mins of tappet noise kapag cold start..
Regarding FC, try niyo petron blaze, ewan ko lang kasi sa akin mas OK ang FC ko highway and city driving
compared sa XCS or VPower nitro+ ng shell. P2 lang naman ang difference.
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January 12th, 2013 11:04 PM #40
Buhay na buhay ang BGC this evening. Bukas halos lahat ng restaurants. Sabi pa nung isang cashier...
Traffic!