My gas gauge will not respond properly to the amount of fuel used. It will register "FULL" until I have gone a good 40 miles or so, and then suddenly drops to about 7/8. After another 50 miles or so, is suddenly drops to just less than 1/4 tank used. Any suggestions?
When I got my car in oct 2016 the gas gauge was at half I filled up and the gauge went to full and never moved so I used the trip computer to let me know what was going on. Two days ago as I was driving the gauge was at half which I verified by the trip computer. I stopped for gas and it took 11 gallons. I have always used an injector cleaner in all my cars with every fill up I also use now and then Marvel Mystery Oil in tank. I think that these additives loosened the float so that it is working. I also use fuel stabilizer now and then. When I got the car it was averaging 12 miles per gallon today I get 20 miles per gallon it did clean out the injectors car runs great. Since yours is not stuck completely I would put some Sea Foam in your tank and some Marvel Mystery Oil!!!!!! You have nothing to loose at this point. I will see what my gauge does in the next few days if the damn rain stops. Take care.
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