I have civic 2004 exi prosmatec and it is giving me 7 to 8 kmpl with ac in city. i have changed the spark plugs from NGK to Denso Iridium plugs, changed engine oil (Havoline), Changed Oil filter (guard), changed air filter (guard), cleaned the throttle body, set the tappet clearances, but still it is giving me 7 to 8 kmpl.
I usually refuell from Hascol. Should I change refuelling station from hascol to pso or total?