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Old 23rd April 2011, 00:08   #211
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Default Re: Do premium fuels harm engines?

For MJD engines only pure regular diesel is recommended. As per my limited knowledge the so called good additives can clog up the superfine injector nozzles.
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Old 23rd April 2011, 10:54   #212
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Default Re: Do premium fuels harm engines?

I used Prelium in the BS2, days and even in BS3 days since many places I went to were only BS2. BS2 was 87RON while BS3/4 are 91RON for regular. So 93RON did help. Now with regular at 91 and Premium at 93RON there is nothing to choose. Honda discourages Premium. I use regular and put in System G every four tankfuls or so.

Diesels there are many reports on engines smoking on Premium. Gets worse if you put in an ECU remap (like Pete's).
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Old 23rd April 2011, 11:14   #213
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Default Re: Do premium fuels harm engines?

Whenever I used premium petrol in my cars and bikes, I noticed that mileage is lower by 1-3 KMPL. I don't know what could be the reason though. But when the car/bike is running on premium petrol engine seems to be little smooth.

I have stopped using premium petrol because of the low mileage and high price than normal unleaded petrol. I hardly see any reason for switching to premium petrol.
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Old 23rd April 2011, 11:22   #214
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Default Re: Do premium fuels harm engines?

On the contrary, Speed 93 works fine on my M'cycle. The normal petrol makes my M'cycle feel a bit sluggish while cruising. You won't notice any difference if you are riding spiritedly.

I am yet to see any effect of a premium diesel over a normal one. Have tanked up twice with premium & the rest with normal.

Seems, most of fellow Bhpians are suggesting to stick with normal diesel. I shall follow the advise. Though, am yet to know whether tanking up once (say in 3 months) on premium will result in any benefit or not as I said earlier
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I heard, it has some cleansing properties. Is there some truth in it?
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Old 23rd April 2011, 11:44   #215
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Default Re: Do premium fuels harm engines?

Recently ,I filled IOC Extra Premium on my Ooty-Bangalore drive .I got a much better FE than usual on the way back.Dunno if it was the downhill drive or a more sedate driving or the fuel that was the reason for this.
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