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tilvin

Using Ioc Petrol 95 - Will Give Engine Issues?

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Dear All,

My friend has recently bought Wingroad Y10. He used to have petrol subsidy from his workplace in litres. So he used to pump this with Octane 95 from IOC. After 2 weeks using, currently car having very sluggish acceleration and he has showed to mechanic and that guy told that Octane 95 has caused engine upset and internal valves have been damaged by this petrol. And he asked to switch back to Octane 90. Is this true? Will Octane 95 cause engine damage in this model? The model is Nissan Wingroad Y10 1500cc EFI.

Thanks....

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rather than switch to octane 90 ask your friend to switch to a another mechanic....not to maka bass..

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Whoops sorry Komi, instead of clicking +1, I clicked on -1 by mistake

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Whoops sorry Komi, instead of clicking +1, I clicked on -1 by mistake

Curses!! Now. Have to live with it!! :P

I'm just amazed at this mechanic. Now I thought I had heard it all, but here's one who thinks higher octane damages a car. Wow. What genius!

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I am wondering whay anyone who gets petrol from the employer pumps 95 to a car that does no reqwuire it... why do our people think that pumping 95 is like feeding the car caviar? :)

The octane number is a requirement in high comp engines, not a fuel that is of a higher grade, which only the riuch and the new rich can pamper their rides with contrary to popular beleif.

But I agree with Komi here, yoour freinds needs to change the mechanic.

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why do our people think that pumping 95 is like feeding the car caviar? :)

It isn't that, they think its like giving the car viagra!!!! :sport-smiley-004:

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It isn't that, they think its like giving the car viagra!!!! :sport-smiley-004:

You cannot blame them for that! After all it is a matter of pistons, bores, lubricants, heat, and the fire!! :mosking:

Seriously all the vehicles undergo a period of sluggish acceleration after being used for sometime just to remind you that the time is overdue for a tune up!

Edited by Rumesh88
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tilvin,

I have used all grades 90 and 95 petrol what is available in S l. I do not find any difference on those. What is recommend have to use.

Sylvi Wijesinghe.

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I am wondering whay anyone who gets petrol from the employer pumps 95 to a car that does no reqwuire it... why do our people think that pumping 95 is like feeding the car caviar?

The octane number is a requirement in high comp engines, not a fuel that is of a higher grade, which only the riuch and the new rich can pamper their rides with contrary to popular beleif.

But I agree with Komi here, yoour freinds needs to change the mechanic.

tilvin,

I have used all grades 90 and 95 petrol what is available in S l. I do not find any difference on those. What is recommend have to use.

Sylvi Wijesinghe.

Hi I nee your both & AL engine experts advice on following points as I've shifted to Octane 95 since I bought my first car (FB15 New Shell ) Because of

1. http://www.caranddriver.com/features/regular-or-premium-test-results-page-2 this says;

(We should note that even cars designed to run on regular fuel might require higher octane as they age. Carbon buildup inside the cylinder can create hot spots that can initiate knock. So can malfunctioning exhaust-gas-recirculation systems that raise cylinder temperatures. Hot temperatures and exceptionally low humidity can increase an engine's octane requirements as well. High altitude reduces the demand for octane.) some other articles also mention same in the web.

2. It just add ~6% to fuel bill (I'm work away use vehicle only in my vacation.

3. Time to time bad low quality fuel incidents happened and now Sapugaskanda refinery issues. (trade unions says low octane fuels formed there is planned to issue) therefore octane 95 may have at least 90.

But on the other hand

1.Ceypetco and IOC octane 90 and 95 specification say RON value 95 and 90 but for both R+M/2 value 89 (hope this is AKI) can that happen?( is there no deference in octane 90 and 95 sold in SL) Are they cheating us?

2. another article (http://chemistry.about.com/od/chemistryarticles/a/which-gasoline-to-buy.htm) says this

(Premium Gasoline

Certain high performance engines benefit from use of high octane fuel. For other engines, using a fuel with a higher octane rating than the vehicle requires sends unburned fuel into the emissions system and catalytic converter. This puts unnecessary stress on the emissions system. For some vehicles, a rotten egg smell coming from the tailpipe signals use of too-high octane gas.)

So what is your experts opinion on these? cause Don't wanna get in to trouble. your advises highly appreciated.

Edited by Charith H Jayasinghe

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But on the other hand

1.Ceypetco and IOC octane 90 and 95 specification say RON value 95 and 90 but for both R+M/2 value 89 (hope this is AKI) can that happen?( is there no deference in octane 90 and 95 sold in SL) Are they cheating us? God only knows :sarcastic_hand:

2. another article (http://chemistry.about.com/od/chemistryarticles/a/which-gasoline-to-buy.htm) says this

(Premium Gasoline

Certain high performance engines benefit from use of high octane fuel. For other engines, using a fuel with a higher octane rating than the vehicle requires sends unburned fuel into the emissions system and catalytic converter. This puts unnecessary stress on the emissions system. For some vehicles, a rotten egg smell coming from the tailpipe signals use of too-high octane gas.)

So what is your experts opinion on these? cause Don't wanna get in to trouble. your advises highly appreciated. The criteria explained here applies to mainly to carb engines designed for octane 90 but not to FI ones with O2 sensors and knock sensors because the air/fuel ratio and ignition timing in FI engines are being continually adjusted based on the sensor feedback. Unless there is a problem with the sensors there is no chance for unburned fuel to escape into the cat converter. (Assuming the ignition system is working properly of course!)

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But on the other hand

1.Ceypetco and IOC octane 90 and 95 specification say RON value 95 and 90 but for both R+M/2 value 89 (hope this is AKI) can that happen?( is there no deference in octane 90 and 95 sold in SL) Are they cheating us? God only knows :sarcastic_hand:

2. another article (http://chemistry.about.com/od/chemistryarticles/a/which-gasoline-to-buy.htm) says this

(Premium Gasoline

Certain high performance engines benefit from use of high octane fuel. For other engines, using a fuel with a higher octane rating than the vehicle requires sends unburned fuel into the emissions system and catalytic converter. This puts unnecessary stress on the emissions system. For some vehicles, a rotten egg smell coming from the tailpipe signals use of too-high octane gas.)

So what is your experts opinion on these? cause Don't wanna get in to trouble. your advises highly appreciated. The criteria explained here applies to mainly to carb engines designed for octane 90 but not to FI ones with O2 sensors and knock sensors because the air/fuel ratio and ignition timing in FI engines are being continually adjusted based on the sensor feedback. Unless there is a problem with the sensors there is no chance for unburned fuel to escape into the cat converter. (Assuming the ignition system is working properly of course!)

Sorry for asking, does QG 15 engine has knock sensors? it has an O2 sensor and what's your suggestion to use octane 95? (In Sri Lanka :sport-smiley-027: ? together with all above comments)[ links to above fuel spec (http://www.lankaioc.net/AutoFuel.php / http://www.ceypetco.gov.lk/Ceypetco_Products.htm#CP12 )]]

Edited by Charith H Jayasinghe

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Sorry for asking, does QG 15 engine has knock sensors? it has an O2 sensor and what's your suggestion to use octane 95? (In Sri Lanka :sport-smiley-027: ? together with all above comments)[ links to above fuel spec (http://www.lankaioc.net/AutoFuel.php / http://www.ceypetco.gov.lk/Ceypetco_Products.htm#CP12 )]]

QG15s come with a knock sensor and a MAF sensor. If you have a MAF sensor in your car instead of a MAP sensor then there has to be a knock sensor too. This is because with a MAP sensor the knock sensor is not mandatory (although many designs include one) for ECU can determine timing based on the manifold vacuum (and RPM). Remember those engine designs with a distributor and a vacuum advance based their timing mechanically on the manifold vacuum and RPM (with centrifugal advance). As for the use of octane 95, well that depends on your taste perhaps. Comments on the quality of fuel you find here in SL are based on speculation and hearsay and it is difficult to come to a conclusion based on those. However, if you are looking to improve fuel efficiency I don't think there would be much difference. But still it may be worth if you can quote the use of 95 throughout when you are selling the vehicle. Other thing is if you are using a plug like LFR6A-11 now you can upgrade it to a bit hotter LFR5A-11 (recommended for this engine) when you change to octane 95 and that would improve the performance.

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