well my car mechanic told me that my car was running lean and he doesn't know why. Anyone can suggest some reasons why its running lean?

I got a Automatic EK DX, bone stock

 

many reason... ask your mechanic to check it... or go see another one.

 

I would change mechanic if he doesn't know why...
1. bad timing
2. dirty im
3. ivac
4. vaccum
so on....

 

Any CEL codes?

 

nope no CEL, he didn't diagnose the problem.. as ppl said on here, it could be many things.. but when he checked the spark plugs, thats when he said the car was runnin lean.

it might be due to a blown head gasket.. but there is no coolant in the oil, so its a 50/50 unless i get a compression check done. btw, how much you think he would charge for a compression check?