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Watch out he mixes drinks the same way!!!ds --- Bob Saville <[EMAIL PROTECTED]> wrote: > ----[Please read http://ercoupers.com/disclaimer.htm > before following any advice in this forum.]---- > > > Hi Alan, > Thanks for all this information. It's one of > the few 'long' messages that held my interest right > to > the end. > > Bob Saville > > > > [EMAIL PROTECTED] wrote: > > > ----[Please read > http://ercoupers.com/disclaimer.htm before following > any advice in this forum.]---- > > > > WHY I have more faith in MoGas than AVgas: > > > > For over a decade I have worked with a company > that makes instrumentation > > that meters and monitors watercuts in > hydrocarbons. > > The main purpose of the instruments when used with > finished fuels is to > > monitor and not pay for water delivered, sold, > transported through pipelines, > > tanks, trucks, etc. > > Water is a funny thing when mixed with fuels. > > Diesel fuel can hold over 1 1/2% of water and > remain homogeneously mixed. It > > will not separate with residence time. It is > normally burnt with the fuel. > > Gasolines work differently, They can also scavenge > humidity out of the air > > but in smaller proportions and it does separate. > The only way to keep water > > homogeneously mixed with gasoline is by mechanical > mixing / agitation. > > Gasolines, diesel, avgas and all other fuels are > transported from the > > refineries by truck or a combination of pipeline > and truck. The further you > > are from a refinery, the higher chance of a > pipeline being involved. It does > > not matter who owns the refinery or the pipeline. > If you believe that TEXACO > > gas stations only sell TEXACO gasoline with > TECHRON and all that advertising, > > you are very wrong. One pipeline across Texas is > shared by three refineries > > and the distribution centers trade, exchange and > sell gasoline to each other > > as convenience and cost dictates. > > Pipelines range anywhere between 6 inch diamter to > 28 inch lines with 12" to > > 18" being the most common sizes. > > The pipeline is always flowing. If a distribution > center, lets say like the > > one in Hearne, TX owned by Texaco buys a shipment > of unleaded gasoline, a > > refinery like the Citco refinery in Lake Charles > takes the order because that > > day they had the best price. They wire SHELL > refinery in Pasadena who owes > > them more money than anyone else. This refinery > pumps 800,000 gallons of > > regular unleaded gasoline at a specified time into > the pipeline with nothing > > to separate it from the products that are already > in the line. The > > combination of the product ahead and behind of the > slug with the fuel > > injected is called "interface". This means that > after a certain amount of > > time the large slug of regular fuel reaches Hearne > and they detect the shift > > in product. The interface ahead of their order. > They send it into a tank > > until they detect the next interface. Here they > shut off the line and pay for > > what they received after calculating volume and > water content. They have also > > received a relatively small quantity of interface > which is a mixture of other > > fuels at the beginning and end of the delivery. > Inb a large shipment, this > > interface is not significant and they do try to > make sure that the shipment > > ahead and after the delivery is as similar as > possible. (They TRY, or so they > > say). > > When Hearne orders a small batch of Avgas, lets > say 50,000 gallons, because > > they don't sell it as fast as regular unleaded, it > is also received with > > interface. Sometimes they divert the interface > into another tank and sell it > > as whatever octane range it is closest to, but > with a significant difference > > in price, they would lose money if they sold their > AVgas interface as regular > > unleaded. Secondly, the volume of the interface > remains constant and in a > > small batch such as AVgas, it is a noticeable > proportion of fuel that may or > > may not meet specifications. Compliance to > specifications is done at the > > refinery and not at the point of final delivery. > > Sorry to disappoint all those of you who are > faithful to one brand and > > quality, but I feel much more confident of a > stable product buying regular > > unleaded fuel than AVgas, mostly because of the > volumes handled. > > Both can have water in them, very low residence > time will allow all of the > > water to separate and it is drained off the > bottoms of tanks at every point > > in the road. > > Any pilot worth his salt should drain the sumps of > his tanks regardless of > > the fuel used. It is best to keep tanks as full as > possible. Air in the tanks > > can hold moisture which will condense and sink > through the fuel. The less air > > in your tanks, the less moisture. Keeping a plane > out in the rain with almost > > empty tanks is going to collect water. Coupes will > burn anything octanewise > > between 80 and 110 octane safely. Aditives are > another story and we will save > > that for a rainy day. > > I also buy fuel for our local airport and I make > darned sure the fuel comes > > from the Phillips refinery in Pasadena, 30 miles > by truck. No pipeline. I > > drain the tank 30 minutes after delivery and > weekly in between. I have no > > control over where Phillips gets their Avgas > though, They may have refined it > > or they may have traded with another refinery for > all I know. > > I get my unleaded at the cheapest gas station, the > one that handles the > > largest volumes. > > I keep the tanks as full as possible, drain my > sumps before pulling the plane > > out of the hangar and have yet to find any water. > > AF > > > ========================================================================== ==== > > To leave this forum go to: > http://ercoupers.com/lists.htm > > > ========================================================================== ==== > To leave this forum go to: > http://ercoupers.com/lists.htm > > > __________________________________________________ Do you Yahoo!? Yahoo! Mail Plus - Powerful. Affordable. Sign up now. http://mailplus.yahoo.com ========================================================================== ==== To leave this forum go to: http://ercoupers.com/lists.htm
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