@Shen Long, where was I laughing (other than your last post)… where was the making fun… and what tv commercials are you referring to (all rhetorical)?
I simply disagree with your statement that crud sits at the bottom of the vehicles tank and one should always leave 1/4 of a tank before topping up as they shouldn’t run till empty (which oddly you now say you do).
Such a premise (that crud automagically builds up) is what servo’s claim whenever someone gets any fuel contamination (as if such crud only comes from anywhere else but their business).
There shouldn’t be any crud in the vehicle tank if the servo’s tanks are clean and they are correctly maintaining their pump filters. Well none that the fuel filter can’t handle during its expected service life.
I can understand how moisture makes its way into the vehicles tank but grit, rotting leaf matter and especially chemicals (used as cleaners at the refinery) can only get into the car via the servo… hence it’s their responsibility to correct but they deny cover blaming everyone else cause they know it will cost you $1000’s to proved they are the cause…
Having said all that, I do like the much older designs where the manufacturer had a drain plug at the lowest part of the car’s tank so mechanics/owners could actually flush crap out… but that was a long time ago when fuel standards were much poorer and crud within the fuel was common issue. Early on, bowsers had large glass chambers where petrol was first pumped into so you could see it was clean, later that changed to glass sight bowls with the bit that twirlEd to indicate flow before even this was removed. Now you can’t see the fuel going into your car…
PS: most people with LPG hardly use petrol because of costs so they often find poor running as the injectors block through lack of use rather than fuel contamination. Its good you run both fuels to keep your engines two fuel systems working well…