ADAM7474

Hello, so my car keeps coming up with an EML light, have had an obd scan and comes up with cylinder 1 misfire ( have replaced the spark plugs and have gapped them to spec, also replaced coil plugs) and a fuel trim, bank 1system too lean However when I put Tesco's momentum 99 in the light clears off after a day or two, when the car has around 50 miles left in the tank the light comes back on. I have done a compression test and it has a good read with a difference of 10-15 psi Any one else having this issue or can shed some light ?

Will check them l, any idea on what the compression test should be reading at full capacity ?

If cylinder 1 has low compression what would need to be done?

Hello so every week the EML light pops up and it reads cylinder 1 misfire and the fuel trim system bank 1 too lean, i have replaced the coil plugs and the spark plug as well as the o2 sensor pre cat. Anyone else having similar issues or had similar issues? It has a rough idle when in neutral