[AsphaltNomad]

I've so far never used premium fuel or any additives in my 2016 1.8TSI Octavia. The car's fuel lid says 95/91 RON fuel. So if I now do a tankful of XP95 fuel from IOCL will the engine adapt to the higher octane fuel automatically or do I need to visit service centre and get something altered so that the engine can benefit from 95 RON fuel?

Also can anyone who has used 95RON fuel in 1.8TSI engines share their experience in terms of power/refinement/fuel efficiency?

[itwasntme]

Originally Posted by AsphaltNomad

I've so far never used premium fuel or any additives in my 2016 1.8TSI Octavia. The car's fuel lid says 95/91 RON fuel. ?

Had a 2016 Octavia 1.8 TSI for 5 years and fed it RON91 throughout. You can try RON95; typically it does provide more power and better (1-1.5 kmpl) mileage. No mods need to be done at all as the sensors (anti-knock etc.) will automatically compensate.

Tell us how it goes!

[AsphaltNomad]

Originally Posted by itwasntme

Had a 2016 Octavia 1.8 TSI for 5 years and fed it RON91 throughout. You can try RON95; typically it does provide more power and better (1-1.5 kmpl) mileage. No mods need to be done at all as the sensors (anti-knock etc.) will automatically compensate.

Tell us how it goes!

Thanks @itwasntme. Sure, just that due to my other car, Octavia's usage is really less and it just a tankful of normal petrol a few days back. Nonetheless the next fill is going to be XP95 and I'll definitely relay my experience.

On a side note, your garage had/has some lovely cars.

[himanshu_trikha]

Originally Posted by Jeroen

Well, as I read it they don't even specify what the octane number needs to be for the manual version.
It is remarkable that there is a difference in E10/20 rating between the manual and the automatic version, which suggest different engines or at least a few different parts. I don't think I have ever seen a E20 only recommendation either. Normally the E numbers are backwards compatible. So a E10 specified engine can handle E5 as well. I can't really think when a petrol with less ethanol would be harmful.

Also, as far as I am aware the E number stipulates the maximum ethanol percentage. Not necessarily the actual ethanol percentage.

E.g. Here in Europe a lof of the octane number 98 fuels are labelled as E5, but have no ethanol at all. Various companies such as Shell, BP, Esso and a few other guarantee no ethanol in their 98 octane.

Jeroen

Finally I managed to get following explanation from manufacturer.

Quote
We had implemented a high compression ratio engine with injectors from a different supplier in AT XUV 7OO Gasoline. This is the reason for recommending Min RON as 95. These injectors are capable of working with E20 fuel. This was done to improve fuel economy of AT vehicles. It may be noted the performance characteristics of MT and AT Engines are pretty much similar and they were officially certified by ARAI.

As MT engine’s compression ratio is lower it can work with Min RON of 91.

Just for your information, as part of legislation that is effective from 1st April 2025, all gasoline engines need to have compatibility with E20 fuel. So we would be implementing engines that would have same fuel specifications of Min RON of 95 and E20. To achieve this, we would be standardising the fuel injection equipment between MT and AT engines.
Unquote


Does this seems logical enough ?

[baarish84]

Originally Posted by baarish84

Experienced it first hand today, unfortunately. Filled up XP95 from IOL COCO BKC Mumbai. Due to some technical issue, two of their regular dispensers were not working. Filled up from the corner dispenser, which is generally unused (first time for me filling from this particular dispenser, normally used as reserve).

Within 20 km of driving, "check engine" light started flashing. Toyota service engineer just called informing water in the fuel filter causing 'check engine' light flash!

Wanted to update , Indian Oil COCO BKC accepted service center bills and fuel sample retrieved from tank. They then took couple of weeks to respond, but reviewed and responded on the case favorably. They reimbursed the expense on ~ INR 30 K incurred for Fuel Injector Assembly, Injector Sets, Fuel Suction Pump assembly, Filter assembly etc.

[manishk123]

Ive been using Speed95 from HP regularly in my 2010 SLK 200. I find the drive to be much smoother and the response is peppier too. Would definitely recommend it over the ethanol mixed regular fuel for such older cars at least. They were not designed for such mixed fuels.

[itwasntme]

Originally Posted by manishk123

Would definitely recommend it over the ethanol mixed regular fuel for such older cars at least. They were not designed for such mixed fuels.

Don't know about HP's blending, but IOCL XP95 is at least a 12% blend with ethanol.

[niranj1997]

My car manufacturer suggests RON95 petrol, so most of the time I use XP95 from Indian Oil and I do see a good difference in the vehicle behaviour. During engine idling, there is no knocking. And there will not be any jerk during the gear changing. Rev matching will be perfect. Overall the car runs very smooth.

Recently when I was refueling, I saw that, the density of normal petrol and XP95 petrol was same. And I asked how it can be same as both are different fuel. He just said, both normal petrol and XP95 was unloaded on same time. So density will be same. I am not sure of this. So wanted to make sure.

I highly suspect that, they are selling normal petrol with XP95 name and price. Also, I just felt, a bit of engine knocking during idling. But I am not cent percent sure.

If anyone is aware of this information, kindly share. It will be helpful during future refueling. Thanks

[himanshu_trikha]

Originally Posted by niranj1997

My car manufacturer suggests RON95 petrol, so most of the time I use XP95 from Indian Oil and I do see a good difference in the vehicle behaviour. During engine idling, there is no knocking. And there will not be any jerk during the gear changing. Rev matching will be perfect. Overall the car runs very smooth.

Recently when I was refueling, I saw that, the density of normal petrol and XP95 petrol was same. And I asked how it can be same as both are different fuel. He just said, both normal petrol and XP95 was unloaded on same time. So density will be same. I am not sure of this. So wanted to make sure.

I highly suspect that, they are selling normal petrol with XP95 name and price. Also, I just felt, a bit of engine knocking during idling. But I am not cent percent sure.

If anyone is aware of this information, kindly share. It will be helpful during future refueling. Thanks

I professionally configure optimum blend recipe for various grades of Gasoline coming out of petroleum refineries. The tanker that arrive at Bunks are SAP monitored and as such, risk of adulteration is minimal, at least in Major cities.

Gasoline density as per BS-VI specifications are 720-775 Kg/M3, typically you will see 91 RON towards lower range and 95 towards middles of this range.

However, my observations at almost all petrol bunks is that density analyzers are at fault and not maintained, so the information you may see is either wrong or made to stuck within this range.

[himanshu_trikha]

Originally Posted by itwasntme

Don't know about HP's blending, but IOCL XP95 is at least a 12% blend with ethanol.

Ethanol has a Blend RON of around 115 and still one of the cheapest blend components, you can expect to see it in almost all of the High RON Fuels being sold in INDIA.

The conventional Fuel chemistry restricts Oxygenates like Ethanol below a certain Vol% in Fuel for various reasons, but like many issues these days, WHO CARES !!!

[Kelly66]

Hi,

I have taken an SBI BPCL Octane card recently and should be getting Rs.1500 worth of petrol. Need to locate a good BPCL station near Indiranagar. As per internet, it says price is Rs.102.98 (13/4/25) which is cheaper than XP95 (110.24). How come? Even Speed 97 is only 103.87. Which one is same as XP95?

Any views?

Cheers!

[kaviprem]

Originally Posted by Kelly66

Hi,

I have taken an SBI BPCL Octane card recently and should be getting Rs.1500 worth of petrol. Need to locate a good BPCL station near Indiranagar. As per internet, it says price is Rs.102.98 (13/4/25) which is cheaper than XP95 (110.24). How come? Even Speed 97 is only 103.87. Which one is same as XP95?

Any views?

Cheers!

I too got the same card few months ago thinking I would stick to BPCL Speed petrol. But, it's become an extremely difficult affair to look for BPCL bunks having Speed petrol in highways. I tried, both in Trichy <> Bangalore and Trichy <> Chennai.

Earlier I used to put XP95 which was widely available in most bunks. Thats not the case with BPCL Speed option.

Regarding the cost, no idea. I havent realised its cheaper than XP95.

[agambhandari]

Originally Posted by Kelly66

Hi,

I have taken an SBI BPCL Octane card recently and should be getting Rs.1500 worth of petrol. Need to locate a good BPCL station near Indiranagar. As per internet, it says price is Rs.102.98 (13/4/25) which is cheaper than XP95 (110.24). How come? Even Speed 97 is only 103.87. Which one is same as XP95?

Any views?

Cheers!

Yes Speed is cheaper than XP95, but Speed is not 95 Octane. and Speed is not the same as Speed97. Speed97 availability is much lower than Regular Speed and the cost is also much higher than Regular speed. Check the prices of Speed97 when you find a bunk with it

[RohanDheman]

Originally Posted by agambhandari

Check the prices of Speed97 when you find a bunk with it

Just for ease of reference, i got the car filled with XP95 yesterday in Delhi at INR 99.xx a liter and the bike got Speed 97 at INR 114.xx a liter.