High Octane=burnt valves

[tallpaul]

Would someone please clear this up for me. A friend told me that running 110 octane in my bike would burn the valves. I only put in 3 gallons and it was the first time I ever did it. After researching it online I get yes's and no's about it. It is suppose to run on 93.

[Mike M]

Nonsense
You can't have too much octane, but you can have too little.

[ctrlraven]

If there is no need for it or auto is not set up for it then it's just a waste of money.

[tallpaul]

Another friend told me to do it to sort of clean out the fuel system. At $8 a gallon I won't do it very often.

[Mike M]

No need for it but it won't burn valves or do damage. Also it will clean nothing as good as pump gas, in fact pump gas has more detergent then race gas.

[SC Cheesehead]

Higher octane gas won't hurt your engine, nor will it help it if you're not tuned for it. Higher octane values merely reflect the fuel's resistance against pre-detonation, which can occur in high compression and/or advanced timing engines.

Also, detergent content in fuel, not octane, will determine level of engine cleaning ability. If you want to assure you're runing quality fuel, use one of these brands:
http://www.toptiergas.com/

[guspech750]

Higher octane gas won't hurt your engine, nor will it help it if you're not tuned for it. Higher octane values merely reflect the fuel's resistance against pre-detonation, which can occur in high compression and/or advanced timing engines.

Also, detergent content in fuel, not octane, will determine level of engine cleaning ability. If you want to assure you're runing quality fuel, use one of these brands:
http://www.toptiergas.com/

I'm surprised I did not see BP on the list. Even though I usually buy Shell. I thought BP would have been on the list.


Sent from my iPhone 4S

DTR + 4.10's + Eaton swap = Wreeeeeeeeeeeeeeedom

[SC Cheesehead]

I'm surprised I did not see BP on the list. Even though I usually buy Shell. I thought BP would have been on the list.


Sent from my iPhone 4S

DTR + 4.10's + Eaton swap = Wreeeeeeeeeeeeeeedom


I thought the same thing.

Bottom line: BP produces a quality fuel with high grade additives, they have just chosen not to paricipate in the Top Tier program:

http://www.bobistheoilguy.com/forums/ubbthreads.php?ubb=showflat&Number=1098496

[Curless]

The higher octane will produce less horsepower than pump gas in your bike. It was designed for 93, not 87 or 110....93. It makes its peak power on 93, if you were to continue to run 110 in it you would get build up on your valves and pistons...it could lead to a burnt valve but not for a long period of time.

[Blown3.8]

It could be running lean on the 110 depending on the Stoich values. Fuel injection can compensate some but carberation can't. So that could cause a burnt valve. The web site I used to go to for all the stoichs of different fuels is no longer so I can't look how far off it is from e10 street fuel.

But lets say your e10 street fuel is a 14.10 stoich(which I believe is correct) and the 110 octane is 13.5(this is just a guess) then you would be 4.5% lean from how the factory set up the fuel map.

[RF Overlord]

What they all said^^^.

In short, your friend is wrong; running 110 octane won't hurt your engine, but it won't buy you anything either.

[LANDY]

Another way to find out how is burning is to read the park plug. Unless your adding timing it wont give you gains.