0 Members and 2 Guests are viewing this topic.
Wow, so the flex sensors are not accurate if water present. Easy way to toast a piston or 2.
a guy needs a water in tank sensor too lol so ya one needs to test each batch of fuel ( i have a 30 gal fuel toter) then you'll know if it gets water in it as you use it, i guess.
I believe the test tube/beaker/baby bottle method is only ball park actually with something like a 5% error range. Assuming you don't have water saturated alky the flex fuel sensors are quite accurate at measuring the water content of alky and calculating from that the alky content. Add to that the fact that e85 can actually dissolve a large amount of water in it,something like 5 oz per gallon you can actually run quite lean due to the water content of the alky fooling the flex sensor. Yes,your 81 gaining 4 percent while in storage was water gain ,not alky.
Been reading all I can on e98 shelf life compared to e85 shelf life and e85 with even small quantities dissolved/absorbed water shelf life. and there's just no really defined answers other than very short shelf life of water contaminated eXX. It's not the alky goes bad , it's the gas component. Anhydrous e98 has an almost indefinite storage life.