Is it true that mixing gasoline of different octane creates a higher octane gas?

Answer 1

It used to be true, paradoxical as that sounds, back in the days of tetraethyl lead. Now, I don't know.

Answer 2

Mixing won't make a gasoline with an octane higher than the two types you are mixing - they will average out and you'll get something in the middle.
If you mixed equal amounts of 93 octane with 87 octane you would end up with a 90 octane gas.

Answer 3

djdancer doesn't know what she is talking about. Octane levels are just a measurement of how much the gas reacts like the chemical octane. Mixing two levels would yield an average of the two. Higher octane doesn't mean better performance. It just means it'll be less likely to combust prematurely. So unless you get engine knock, stick with your manufacturer's suggested octane level.

Answer 4

The short answer is NO
Octane is a measure of anti knock compound that is put in gasoline for internal combustion. Buying higher octane gas than you need does not improve the gas, it just wastes money. Go with the rating that your manufacturer suggests
If it does not knock you are ok

Answer 5

djdancer is on drugs, nobody washes gas tanks. Since Costco in Colorado only sells 85 and 91 octane gas and the recommendation for my truck is 87 octane, I usually fill up alternately with 85 or 91 when I have a half tank of gas. Hopefully, this averages out to around 87 octane.

Answer 6

yes i race motocross and mixing a gallon of race gas at 110 octane with 4 gallons of premium at 92 octane is 92 times 4 plus 110 divide by 5 = 95.6 octane gas. use the same formula to calculate what you are doing or need to do.

Answer 7

nope. actually it would ideally make a kinda of average gasoline, like if you put 83, 90, 91, 98 in one drum you would get ideally a 90, but just more of it... but who knows how that really would work, Just wouldnt advise it, they all have different chemistries with regard to the amount of actual hydrocarbons in the solution

Answer 8

No. You can't end up with anything higher then you started with.
It's the law of averages.

Answer 9

no.there aren't high octanes anymore.only leaded gas had different levels.now the difference in gas,believe it or not is,how much water is in the gas.when they clean the storage tanks they use water.sunoco gets their gas from the top of the tank while small oil companies get theirs from the bottom.the lower in the tank you go the more water is left from washing the tanks.you get either no water or a little to a lot of water depending om where you buy your gas.get gasline anti freeze that will help eliminate water and should help with sluggish performance.

Answer 10

so you add and then take off what???