Gasoline Engine Oil brand?

[speedyfix]

we didn't have catalytic converters on civics until 2001.

[johnjoseph]

Helix afaik is for gas engine DGU is made for diesel engine. Check the API rating as well.

Sa mga nabasa ko na dito, ang Caltex DGU ay safe din gamitin sa gasoline engines dahil sa rating na API CI-4/SL, mababa ang ZDDP at Phosporous content kaya won't harm the catalytic converter. I also read that this motor oil have high detergency additives that removes engine sludge slowly and suspend them sa oil to be trapped sa filter, kung gaano katagal cleanse the engine sludge, siguro, depende na sa amount present.

[nivraarvin]

Volatility is inversely proportional to ZDDP content.

Meaning, the lesser the ZDDP content, the more likely na mag change to gas state ang motor oil and ma-coat ng motor oil ang catalytic converter.

[Goma123]

Volatility is inversely proportional to ZDDP content.

Meaning, the lesser the ZDDP content, the more likely na mag change to gas state ang motor oil and ma-coat ng motor oil ang catalytic converter.

Hindi ata volatile ang oil sa normal na takbo ng makina sa 60 centigrade. Hindi mageevaporate ang lube oil base stock. Ang gamit sa automotive engine oil ay halimbawa 500 SN may flash point na 237 centigrade.
AP/E SN 500.

Pag umabot ng 200 centigrade ang engine oil temperature mo, magdasal ka na men.

Ang ZDPP anti-wear lang ito, ika nga e pampadulas lang ng bakal.
https://en.wikipedia.org/wiki/Zinc_dithiophosphate

[Jiggs]

ZDPP ia one known poison of the catalyt in a catalytic converter, oil mist can somehow be carried over sa gas exhaust via the valve seals..WALA namang perfect sealing engine..thru that mapupunta yung ZDPP. my stance is mas priority ko engine parts Kesha sa catcon. And not instantaneously naman masira ang catcon..it's expensive but dami mabilihan surplus nito.

[s10pao]

Volatility is inversely proportional to ZDDP content.

Meaning, the lesser the ZDDP content, the more likely na mag change to gas state ang motor oil and ma-coat ng motor oil ang catalytic converter.

question lang. dba kaya nga binawasan ang zddp content ng oils with api rating >SL ay para ma prolong ang service lifetime ng catcon?

[nivraarvin]

Hindi ata volatile ang oil sa normal na takbo ng makina sa 60 centigrade. Hindi mageevaporate ang lube oil base stock. Ang gamit sa automotive engine oil ay halimbawa 500 SN may flash point na 237 centigrade.
AP/E SN 500.

Pag umabot ng 200 centigrade ang engine oil temperature mo, magdasal ka na men.

Ang ZDPP anti-wear lang ito, ika nga e pampadulas lang ng bakal.
https://en.wikipedia.org/wiki/Zinc_dithiophosphate

Sir Jiggs answered your comment. I hope you'll stop praying.

Sumasama din sa combustion chamber ang oil. What determines if it will become gas is the temperature and PRESSURE inside the chamber. (You can boil water at zero degrees celsius) Once it changes to gas state, the hydrocarbon engine oil will ignite. Engine oils are hydrocarbons with additives like zinc, zinc will still be zinc and will not participate with the fuel-oil-oxygen combustion. It will be in a gaseous state though and will pass thru the cat con.

ZDPP ia one known poison of the catalyt in a catalytic converter, oil mist can somehow be carried over sa gas exhaust via the valve seals..WALA namang perfect sealing engine..thru that mapupunta yung ZDPP. my stance is mas priority ko engine parts Kesha sa catcon. And not instantaneously naman masira ang catcon..it's expensive but dami mabilihan surplus nito.

question lang. dba kaya nga binawasan ang zddp content ng oils with api rating >SL ay para ma prolong ang service lifetime ng catcon?

That's what they (API and car manufacturers) say.

Having an API license is expensive, but if you do have it, car manufacturers will promote your oil.

It's all about money.

[chookchakchenes]

nivraarvin, jiggs,

Ano level ng zddp ang safe pag may catalytic converter?

Ano oil maadvice nyo sa subaru brz at civic fd. Dalawa choice ko delo 400 or zic a?

[s10pao]

That's what they (API and car manufacturers) say.

Having an API license is expensive, but if you do have it, car manufacturers will promote your oil.

It's all about money.

so ang sinasabi mo BS ang API ratings?

[johnjoseph]

ZDDP content of less than 1200 ppm is safe for cat con of gasoline engines, that's API CI-4/SL grade, as per previous posts dito