Cultus fuel average problem

[pwuser152257362750]

I am using Cultus 2018 model, it was giving me avg around 17.5+ on highway and 14.5+ on local with A.C, suddenly avg has dropped to 14.5 on highway and 12 on local, this happens after my trip on motorway when I drove it to 160+, after that ride car's fuel average dropped dramatically, after this changed plugs (after driving around 20000 km)
Plz guide wt cld be the problem, is thr smthng related to 160+ speed or it's smthng else.
Thanks

[engnr.mubashir]

Could be caused by poor fuel quality.

[saqibhassan95]

Your spark plug gap ? It should be 0.95-1mm
Secondly, did you get your throttle body cleaned at 20k odo?
And last, engine oil grade you're using?

[roboxx]

Why you changed spark plugs at 20k milage?

[engnr.mubashir]

Get the spark olugs changes from suzuki now.

[pwuser152257362750]

Spark plugs gap is ok, using oil 5W30, throttle body was clenaed after 20K km and plugs were changed along with it.

[pwuser152257362750]

I m regularly using Total fuel from a company operated station from almost last 5 to 6 years, just to clear fuel quality dis time tried from two other fuel stations but average remained same.

[pwuser152257362750]

As recommend by Suzuki.

[pwuser152257362750]

Using genuine plugs, purchased from open market but surely they r d one sold by Suzuki

[engnr.mubashir]

Get it checked and tuned from suzuki. Now it's the only option left it's their product and no knows better than them. My cousin was having issue regarding fuel consumption with his vitz he tried to get tuned from almost everywhere but then then take it Toyota dealership although vitz is not locally produce but those guy figured out and brought it back to what my cousin was expecting it from. Similar story is for suzuki mehran too.

[pwuser152257362750]

Got it's nfuel sensor cleaned and fuel average increased from 14.5 to 16.8, sensor was just washed with petrol.

[saqibhassan95]

Glad to know

[engnr.mubashir]

Ypu mean oxygen sensor?

[pwuser152257362750]

Electrician called it fuel sensor, it's located on left side of engine,

[pwuser152257362750]

Yep, still it's 1 km/ltr less but at least improved by 2 km/ltr

[engnr.mubashir]

Never heard of this kinda sensor.

[pwuser152257362750]

ll try to post picture, it's what electrician called it, may b original name is different

[hellousman30]

I'm having the same issue after tuening from Suzuki.
Can i get the picture which u r talking about. Mine giving the 13km/litter.