hope everyone is doing fine
So lately I have been noticing that my civic has started making a grr grr sorta sound between 2000 and 4000rpm, especially on uphill climbs. The sound is from the engine and it's sorta the sound which tappets outta adjustment makes, like those old taxis. Slight sound but it is there. my car's 40k kms checkup is coming up in march. thought the car is 17800 driven but the time limit is up.
Lately hioctane isn't available so using normal petrol, can that be a reason?
I mean the engine sound isn't butter smooth as it used to be, roughness aa gaye hai engine sound mein. the car is otherwise fine.
also can anyone give me a rough idea of what is normally done on a 40k kms checkup keeping in mind that the car is almost 18k driven.