Hi guys. The motor in my '90 coupe has a lot of wear, (lots of blowby), and I usually get around 15 mpg. I noticed recently it is saying I'm only getting around 12.6. I replaced the plugs, wires and air filter within thelast couple of months. Any ideas on why I get such terrible mileage? Thanks for any info you guys can give me.

 

Injectors might need cleaning. Have youu checked ignition timing lately? Worn timing chains will cause the timing to be retarded.