Is this normal. I think it may be a bit thristy. If it turns out thirsty what are the basics to check. Eg, injectors, air filter, fuel filter?? In my diesel 4x4 the air filter has massive impact on economy so I checked mine and it's good. The engine has done 270,000km/ around 170,000 miles so it aint new any more. I suspect a high km engine just tends to use a bit more. Thanks.