99 viggen gas mileage
 

hey all i have a 99 viggen with 156k, im only getting 19.4-20.4 mpg on the highway and in the city.. it has a bsr exhaust and intake thats it, has a new ign casset and ngk plugs.. what can be casuing me to only get 240 miles outa my tank??

when was your last fuel filter change? is the fuel pump working properly?

That's bad?

from what i read it isnt the greatest other people post 25-30 mpg... the weird thing with my car is sometimes it will feel really quick then other times its sluggish... i do have a flexpipe leak and 2 other leaks at joints but i will take care of them as i get the $$ to do so.. i never touched the fuel filter.. i just bought it 3 weeks ago.. where is the filter and how hard is it to change?

filter is next to the tank... really easy to change and cheap too. Replace all the vacuum hoses while you're working on the car. Also 25-30 isn't a given. Driving style, tire pressure, alignment, extra crap in the trunk all play a role in this.