FUEL TIP OF THE DAY!

[Rhett]

If you read the Power Foam threads, you'll see all of this info. It's good to have it repeated though, it can't be stressed enough that if your truck is designed to run 87 octane, then you should run 87 octane.

If you have a chip programmed for 93, then you should run 93.

Running 89 or 93 octane in a vehicle set to run 87 will increase the rate of carbon buildup.

 

[chris c]

Originally posted by 96xplorer4oh
I do not know where you get your info. But if the octane is high in number, then the flash point is higher also. The higher octane requires a higher flash point to burn more efficiently which you find in a sports car or a car that has alterred dynamics than that of a stock 6 cyl., or a 4 cyl. In returns you will burn the fuel in any engine, but not efficiently. And the end result is dirty chambers and valve train. So you think what you want and everyone is entitled to there opinion, and that is yours. But facts are facts, regardless of your opinion.

ahahahahahaa..

you are right, facts are fact. look up the msds on fuels and look for yourself. every fuel has an msds on the web.

the flash point of fuel is around -40 degrees C. even if the flash point varied a few degrees between 87 and 93 it is not going to effect much in the way of ignition. do you know what "flash point" means?

 

[matey]

in the little book you get with the car it has fuel saving tips as well the no 1 tip is turn off the air conditioning :australia

 

[SkyJumper]

Listen Chris C, I am not going to debate this with you. This is the result from Berkley University professor:The higher the octane, the harder it is to get to ignite. A higher octane may be necessary to prevent pre-ignition and detonation in a high performance engine. Higher-octane fuel will generally burn slightly slower than a lower octane fuel, which could require a change in ignition timing. Using more octane than you need will not help power, the slower burn rate will actually cause you to lose some power.

Now I do know what flash point is, the lowest temperature at which the fuel vapors will burn. Gasoline's flash point is usually around minus 20f.

And the temp is also the Berkleys Professor's results to the 2003 fuel octane testing done there.

With a vehicle that requires a lower octane will result in a slower burn to the higher octane than required by the manufacture is a harmful thing, causing excessive carbon build-up in the chambers and valve train. So once again the facts.

 

[Ford_Racing_Guy]

if i run Seafoam through the fuel system every once in awhile does this keep the carbon buildup down?

expecially if i run the 89 octane gas?

 

[chris c]

Originally posted by 96xplorer4oh
Listen Chris C, I am not going to debate this with you. This is the result from Berkley University professor:The higher the octane, the harder it is to get to ignite. A higher octane may be necessary to prevent pre-ignition and detonation in a high performance engine. Higher-octane fuel will generally burn slightly slower than a lower octane fuel, which could require a change in ignition timing. Using more octane than you need will not help power, the slower burn rate will actually cause you to lose some power.

heh, i run 87. you don't have to sell me on that. i am not trying to say run 93. first you were speaking of flash points, now flame speed. flame speed is not just a characteristic of the fuel. combustion chamber design and compression ratio factors in too. besides, the flame speed [which is usually measured in milliseconds] almost identical for 87-93 octane [34-40 cm/sec]. hey, it is almost the same for hepane and iso-octane with octane ratings of 0 and 100 respectivaly. the test for assigning octane numbers. this is all fact and available to all who want to look it up.

in addition fuel blends vary. this can be from day to day with the same supplier depending upon what blend is cheaper for the day. that being stated you can get a batch a 87 that has more power than 93, or vice versa. not always predictable.

Now I do know what flash point is, the lowest temperature at which the fuel vapors will burn. Gasoline's flash point is usually around minus 20f.

And the temp is also the Berkleys Professor's results to the 2003 fuel octane testing done there.

well, it's ~ -40c [or f since they are about the same at that temp.] on all the fuel msds. don't believe me, check for yourself... or have that professor call chevron and debate the data on their msds.

http://www.chevron.com/lubricants/

i'll give you this link... don't tell me that is not fact.

With a vehicle that requires a lower octane will result in a slower burn to the higher octane than required by the manufacture is a harmful thing, causing excessive carbon build-up in the chambers and valve train. So once again the facts.

how is this fact? engines don't require "lower octane ratings." they require a certain octane rating. often times the engineers error on the side of caution and vehicles are marked to run on octane levels higher than they could actually run on. engineers even go as far as to factor in the deposits and wear on the engine as it ages so the recommended octane the state will still prevent knock and pre-ignition as the vehicle ages.

 

[CQ7String]

My last car had nitrous, so I was all about fuel efficiency for quite some time.

One of the best tips I picked up was to check the gas stations that you fill up at. Older stations have older tanks in the ground, and lesser-known (non-chains) tend to be even more slack about how often they clean/replace their tanks in the ground.

Old tanks have sediment at the bottom, which regardless of filtering between the tank and the nozzle, does indeed end up in your gas tank.

The newer the station, the less sediment in the tank, the cleaner your gas will be. And that's always good.

And now for a shameless post of my old setup:

 

[Skeets'91EB]

I'm going to do a combustion chamber flush b/c i want to go back to 87 w/o knock. Would Seafoam do the job or should i pay a bit more than twice the amount for the dealer to flush it?