Where the H<E<Double toothpicks did that mechanic train?? Kelloggs?? Cracker Jacks??
That "test" is pure codswallop. Contaminated fuel is tested with a spectrometer NOT by setting it on fire. You could do a more accurate test at home by siphoning out a glass bottle full of your fuel and simply letting it set for a day. Contaminants such as water,diesel fuel,etc are HEAVIER than gas and will separate out by themselves. You will be able to see distinct separate levels. Of course any solids will settle to the bottom.
Anyone who has a 2-stroke engine such as a chainsaw,leaf blower,etc which requires you to mix gas and oil will be familiar with this. It's why you are told to shake the mixed gas before each use..the oil separates out.
Now,on the other hand,you CAN easily get contaminated fuel from your friendly gas station. This is not necessarily a careless act on their part. If their storage tanks are real low when they get a delivery it stirs up all the residue on the bottom of their tanks and some can get into your vehicle when you gas up. Every gas station has a certain amount of water,etc in the bottom of their storage tanks caused by condensation..it's unavoidable. I usually will not fill up at a station where a tanker is unloading. Early AM in the cities is also not a good time because the fuel trucks usually deliver thru the wee hours in these places to avoid traffic.
The best insurance to avoid most fuel probs is to change fuel filters on your car regularly. I generally suggest Spring and Fall. Also use a good gas treatment every few fillups. The same would apply to a diesel engine(of course you would use diesel fuel treatment).
The above comes from years of tinkering with hot cars,8 years of hauling fuels and going on 30 years of nursing big rigs thru every kind of weather conditions.
BTW..tell your "mechanic" never go to work in a truckstop/truck garage. If he told this crap to a trucker they would STILL be looking for his face!!!
That "test" is pure codswallop. Contaminated fuel is tested with a spectrometer NOT by setting it on fire. You could do a more accurate test at home by siphoning out a glass bottle full of your fuel and simply letting it set for a day. Contaminants such as water,diesel fuel,etc are HEAVIER than gas and will separate out by themselves. You will be able to see distinct separate levels. Of course any solids will settle to the bottom.
Anyone who has a 2-stroke engine such as a chainsaw,leaf blower,etc which requires you to mix gas and oil will be familiar with this. It's why you are told to shake the mixed gas before each use..the oil separates out.
Now,on the other hand,you CAN easily get contaminated fuel from your friendly gas station. This is not necessarily a careless act on their part. If their storage tanks are real low when they get a delivery it stirs up all the residue on the bottom of their tanks and some can get into your vehicle when you gas up. Every gas station has a certain amount of water,etc in the bottom of their storage tanks caused by condensation..it's unavoidable. I usually will not fill up at a station where a tanker is unloading. Early AM in the cities is also not a good time because the fuel trucks usually deliver thru the wee hours in these places to avoid traffic.
The best insurance to avoid most fuel probs is to change fuel filters on your car regularly. I generally suggest Spring and Fall. Also use a good gas treatment every few fillups. The same would apply to a diesel engine(of course you would use diesel fuel treatment).
The above comes from years of tinkering with hot cars,8 years of hauling fuels and going on 30 years of nursing big rigs thru every kind of weather conditions.
BTW..tell your "mechanic" never go to work in a truckstop/truck garage. If he told this crap to a trucker they would STILL be looking for his face!!!
