Loss Off Gas Mileage In A 95 Corolla.

[Blek]

Hi all, I'm pretty new here and really new to corollas and working on cars in general.

I'm trying to help out my moms car which she was complaining was only getting bad mileage. I took it out and tested it and it seems to be only getting 19 mpg. Which is worse than my truck 0.o It is a 95' Corolla with a 1.8 litre engine and 100,000 miles. I checked the air filter and it was filthy and full of sand so I vacuumed it out and replaced the air filter and replaced all the spark plugs which were also nasty. That helped a little but not as much as I would like.

Do you all have any suggestions to get the fuel mileage better? I assume a Corolla should be getting much better than this.

Also I was wondering what type of motor oil you would suggest for this car. It is in an extremly hot environment in arizona. Being 105-120 this summer. She also has a long drive to Utah this month I'de like to make sure she is ready for. ARe those high mileage motor oils just a gimmick or are they worth it?

Thanks in advance.

[Corolla_XLI]

My best guess is tyre pressure! Check it to make sure it is right. The correct pressure should be stated inside the glove box or in the service manual. If that doesn't help, go and buy some fuel additive (like Redline). It should clean out your injectors, that might be clogged with nasty deposits.

[Boro Sera]

Check that you haven't got a brake caliper (or handbrake mechanism) sticking. That'll screw your economy up loads.

Rich

[DJR-TRD]

Poor fuel economy may be due to various stuff.

Check tire pressure as stated earlier, driving habits, avoid hard braking, etc.

How's engine?

Spark plugs, air filter, fuel filter, dist cap, rotor, wires, dirty/clogged throttle or carb.

I did this and more on mine and got my fuel econ back.

[Unity Jon]

You've already cleaned up or replaced the filter its time to do the throttle body, take off the inlet and use some thinners on a rag and clean all the black crap out until its shiny inside all around the butterlfly and as far as you can reach, it will make a massive difference.