Fish Felon wrote:The other one right off the top of my head is the gas tip.....where you pump a gallon of premium non-oxygenated gas into your car before pumping it as boat gas at any pump where the line is shared between the different types of gas...
...because otherwise you'll wind up with at least a half gallon of garbage 87 octane with 10% in with your good gas. When burning boat gas?
It'll make a difference.
I don't think this is the case anymore. Granted this isn't exactly from the horses mouth, but from a mostly fire dept perspective... This is one of those "grandpa always did" things that I grew up doing.
A few years ago I was at the lumberjack championships in hayward and was talking to the stihl or husq rep there who was also on his locaal fire dept. Somehow this was mentioned and he quickly & confidently claimed all modern pumps, even those with a shared hose have a back flow to clear the lines of fuel for safety 1st and not getting the wrong gas is just a bi-product. Apparently the old style hoses that didn't do this, especially in southern climates could sit in a (often black) rubber line for hours in the sun and create a definite safety issue swelling, pressurizing, etc.... Makes sense I guess when you think about how quick a small 1 gallon gas can that seals can turn into a pumpkin in the summer.
Granted there's some old stations out there with the analog meters and metal trips that what you're talking about is likely the case but virtually any pump that allows you to pay-at-the-pump will also have modern enough safety features to backflow the fuel into the respective tank and you won't get partiallyt he wrong fuel.