if your engine has not yet detected the bad gas, then perhaps the gas boys did not put in the wrong fuel after all.
Would it be easily noticeable? Mga 4-5liters of diesel nakargatpos 1/4 lamang ng fuel ko nun. Drinive ko papnta ko kagabi for 3kms, tapos pgkagcng pauwi ng mga 5. No jitters pero lag sa acceleration yun mga na notice ko