I need to know. Lately i noticed that sometimes after having the engine running for a long time it comes a moment when it just goes down to 1000RPM. The thing is when sometimes when i turn it off nd have 2 go out again later when i start it does but the oil press meter sometimes just rises 2 the middle, it doesnt raise more till u accelerate a lil bit. Is this normal of the 4AGE or something wrong or on time to change?