saiyanL4

hey guys been searching and reading bout bad fuel economy and still havnt really found anything definate. got a 96 es300, 1st purchased bout 5 months ago. notice only got out bout 300-350 klm until the fuel light came on. so basically 350 klm for 55 litres of fuel. now to me thats pretty bad for a 70 litre tank. did a service myself the other day. oil, oil filter, sparks, air filter and fuel filter. seems it hasnt change the fuel economy much. does any1 hav any other ideas of what could be the cause of this problem?
read that i should get a new 02 sensor? b4 i buy anything wana make sure if it is worth it.
ooohhh also did transmission oil aswell

cheers

Lexusfreak

Did you also replace the PCV valve & I assume your tire pressures are correct?

saiyanL4

pcv valve? tired might be a lil part of it but cant be that bad right?
i checked it a couple months ago it was fine.
tell me more bout this pcv vlalve, soz but im not a mech i just know the basics

Lexusfreak

This should explain things in detail...

http://en.wikipedia.org/wiki/PCV_valve

llcoolpass

first off, the most intelligent and logical answer is really a question,

what fuel economy did you expect in this particular car
[measured in liters/100kilometer or miles/gallon]?

Lexusfreak

Actually that works out to 15.71 litres per 100 km's or 14.97 per U.S. gallon so that indeed does not sound quite right.

saiyanL4

lol master yoda......
ye its somewhre around that mark..i never noticed it at the start but soon realised that there was somefin wrong. this car should give me at least 450- 500klm per tank easy.
might go and get an 02 sensor see if it helps. if not i guess ill have to take it to the mechs to have a looks. the k's im getting out is pretty rediculous if i must say.

Lexusfreak

Yeah something is not right.....but I think that year ES has 3 O2 sensors.

And since the PCV valve is like a $4.00 part & is plug & play....change that too.....can only help.

saiyanL4

hmm...interesting i was just thinking the 1 thats on the exhaust manifold.
and ill def look into this pcv valve if its as easy as you say it is..

llcoolpass

PCV is not likely cause, and certainly not a major player in your car's MPG or l/100km, but I think it's good to change it if it's due.