Unioil EURO 5 Gasoline/Diesel

**Lin Dan** · November 27th, 2018 01:26 AM

I personally prefer the 95 over the 91 RON. I just find the engine (using 91 RON) a bit sluggish especially during highway drives. Just my observation.

**jut703** · November 27th, 2018 01:30 AM

Originally Posted by TheUninvited

I roughly get the same fuel consumption sa XCS and 97 ng Unioil. Idk yet sa 91.

Actually first time ko mag 91 RON (minimum ata for R18), before 97 Unioil, XCS ako, and ramdam ko yung difference.

I also drive in the wee hours so sulit sakin yung higher octane fuels and easily noticeable if may +/- sa acceleration at least.

The difference is noticeable kase for me, like yung parang after mo magpa change oil and replace air filter.

If there was a difference in performance it should affect lap times, but it doesn't.

More often than not it's just placebo effect unless the car is designed to run better on higher octane (i.e. most turbocharged engines and engines with custom ECU tunes).

The R18 is a run of the mill engine and doesn't benefit from higher octane, like most other econoboxes. Haven't seen any empirical data to prove otherwise.

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**TheUninvited** · November 27th, 2018 01:47 AM

Yeah common info na placebo lang, and I always have thought of that kaya XCS lang ako dati instead of Blaze.

What happened this time was yung brother ko ang nagpakarga kase hiniram over the weekend for a trip.

I just told to gas up Unioil 97 and I always leave the S&R card sa car - I used the car today for work (half tank) and ayun, I noticed it and I was mad at first kase baka may nasira or something, and I asked if ano pinakarga.

Then that confirms it na hindi placebo at least for me.

For the laptimes, the 'gain' is really not that significant to affect lap times. Noticeable but not significant, for racing purposes, I guess. I don't race, but that's my theory.

Then my brother told me yung storya ng gasboy dun sa Guada station lol, na lagi daw nauubos 97 nila, 95 next and natitira yung 91.

So sir Jut, curious to know, when you race, 91 lang gamit mo?

**jut703** · November 27th, 2018 10:59 AM

Originally Posted by TheUninvited

Yeah common info na placebo lang, and I always have thought of that kaya XCS lang ako dati instead of Blaze.

What happened this time was yung brother ko ang nagpakarga kase hiniram over the weekend for a trip.

I just told to gas up Unioil 97 and I always leave the S&R card sa car - I used the car today for work (half tank) and ayun, I noticed it and I was mad at first kase baka may nasira or something, and I asked if ano pinakarga.

Then that confirms it na hindi placebo at least for me.

For the laptimes, the 'gain' is really not that significant to affect lap times. Noticeable but not significant, for racing purposes, I guess. I don't race, but that's my theory.

Then my brother told me yung storya ng gasboy dun sa Guada station lol, na lagi daw nauubos 97 nila, 95 next and natitira yung 91.

So sir Jut, curious to know, when you race, 91 lang gamit mo?

Yeah last race I had 91 in my tank. I don't deliberately empty out my tank before a track day. I just go to the track with what I have in my tank.

Going back to the discussion, a sample size of one doesn't prove a theory. As you've shared your anecdotal evidence, I've also shared mine wherein none of our cars had markedly different performance because of fuel used.

Here's another experiment done by auto journalists (with the same conclusion - higher octane doesn't translate to verifiably better performance/efficiency):
RON 95 vs RON 97 fuel test - which one should you use?

I've also worked in the petroleum industry and we could never claim that higher octane = better performance because none of our testing proved such (unless the engine was specifically designed for higher octane). I take the findings of a multinational petroleum company's R&D to be more reliable than just my personal experience or that of other people on the internet (all just n=1).

Which is why you'll see that all marketing for higher octane fuel is focused on a "cleaner burn" or whatever permutation of the phrase - because that's what we can empirically prove, that the additives in higher octane fuel have more detergents than low octane.

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**kisshmet** · November 27th, 2018 11:01 AM

Originally Posted by TheUninvited

Yeah common info na placebo lang, and I always have thought of that kaya XCS lang ako dati instead of Blaze.

What happened this time was yung brother ko ang nagpakarga kase hiniram over the weekend for a trip.

I just told to gas up Unioil 97 and I always leave the S&R card sa car - I used the car today for work (half tank) and ayun, I noticed it and I was mad at first kase baka may nasira or something, and I asked if ano pinakarga.

Then that confirms it na hindi placebo at least for me.

For the laptimes, the 'gain' is really not that significant to affect lap times. Noticeable but not significant, for racing purposes, I guess. I don't race, but that's my theory.

Then my brother told me yung storya ng gasboy dun sa Guada station lol, na lagi daw nauubos 97 nila, 95 next and natitira yung 91.

So sir Jut, curious to know, when you race, 91 lang gamit mo?

95 or higher protects your engine from knocking better than 91

Higher octanes give you more milage..make it a habit to reset your trip meter and youll see the difference..its not placebo. A full tank of 91 will give you less coverage (kilometers) than a full tank of 95.

Higher octanes is more economical if one knows how to compute in terms of peso per kilometer. Price of a full tank divided by kilometers covered running from a full tank

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**jut703** · November 27th, 2018 11:27 AM

Originally Posted by kisshmet

95 or higher protects your engine from knocking better than 91

Higher octanes give you more milage..make it a habit to reset your trip meter and youll see the difference..its not placebo. A full tank of 91 will give you less coverage (kilometers) than a full tank of 95.

Higher octanes is more economical if one knows how to compute in terms of peso per kilometer. Price of a full tank divided by kilometers covered running from a full tank

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No it doesn't. I have thousands of km of data (not just 1 or 2 tanks) comparing 95 and 91. No difference in FC.

74 fillups with 91 - 11.1 km/L
149 fillups with 95 - 11.1 km/L

Even peak FC - I've gotten 23 km/L both with 91 and 95.

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**Xotigu** · November 27th, 2018 11:27 AM

I find UniOil's 95 better than Shell's 95 Vpower.haha
This is just me since I know how my car runs so might be different for others

Question, if I still have 95ron gas remaining and suddenly filled up 97ron, will it damage the engine?
I tried to search online but I got mixed opinions.
I asked this because sometimes the gas station ran out of 95 and needed to fill up gas.

**kisshmet** · November 27th, 2018 11:28 AM

Originally Posted by jut703

No it doesn't. I have thousands of km of data (not just 1 or 2 tanks) comparing 95 and 91. No difference in FC.

74 fillups with 91 - 11.1 km/L
149 fillups with 95 - 11.1 km/L

Even peak FC - I've gotten 23 km/L both with 91 and 95.

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I just use my head dude..i know my math. I dont simply take other words for it..i confirm things with math..the universal language

My computation tells me that its cheaper to gas up with higher octanes than 91 which is a waste of money for me

You say you race at 91..goodluck with that

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**kisshmet** · November 27th, 2018 11:29 AM

Originally Posted by Xotigu

I find UniOil's 95 better than Shell's 95 Vpower.haha
This is just me since I know how my car runs so might be different for others

Question, if I still have 95ron gas remaining and suddenly filled up 97ron, will it damage the engine?
I tried to search online but I got mixed opinions.
I asked this because sometimes the gas station ran out of 95 and needed to fill up gas.

Higher octanes are better in terms of knock protection so 97 is better than 95

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**jut703** · November 27th, 2018 11:39 AM

Originally Posted by kisshmet

I just use my head dude..i know my math

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Can you "use your head" and explain why I get the same fuel economy when using either 91 or 95 RON?

You specifically said to reset my tripmeter per full tank on 91 and then again on 95 and compare my FC. Which is what I already do on a regular basis and these are my findings:

Using 91 RON only - 11.061 km/L:

Using 95/100 RON - 11.049 km/L:

Not all cars benefit from higher octane because they don't advance ignition timing just because you used higher RON.

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