Tire Pressures

[Scarlet Pimpernell]

Mine are 41rr and 38Fr. This should give an even bttr MPG result. Well - 723 miles travelled in 3 days last week, and I got....wait for it....39mpg - all at 70 mph, using 6th where practical and the journey times were when the roads were clear. Most of the time i drive like a nun!

Something ain't right with my car at all...or your 13 miles were all down hill ;)

The car was warmed when I reset the counter and the road is mixed up and down hills. I noticed that the rev counter was sitting at around about 2300-2400rpm in 5th, right where I get this little step in power, my theory is that the variable geometry turbo alters setting at this point from a high torque set up to one that is better for higher revs. I have also noticed that I don't get good economy below the max torque band. So if I change up to 6th at 70mph the engine appears to labour and has to use more fuel struggling against the gearing so I think that higher gear does not equal better economy in all situations. I always try to keep between 2000-2600rpm when cruising and 2000-3600rpm for accelerating through the gears. I only ever dip below 2000rpm in 1st, 2nd or 3rd gear. I would only ever use 6th if I went fast enough to be over 2600rpm in 5th.

Believe it or not, I drive with a very similar theory

[markoose]

Believe it or not, I drive with a very similar theory

Ah, well i don't know what to say then... maybe a hug?

Wait! Only kidding, I am going to see what I get for the rest of this week. Cue dramatic music... Something's changing with my car, I don't know if it's just getting fully run in or what but I've noticed with every car I've had in the past and now this one that I get to a certain mileage and it just becomes sweeter, the gear shift improves, the engine seems smoother, mpg up... maybe I'm achieving a symbiotic relationship with my Lexus like Alan Partridge had. I do know that someone has sprayed "***** ***** partridge" on the side and I've filled up the passenger footwell with scotch egg wrappers.

[Scarlet Pimpernell]

luvvit

It does appear to give the impression of an improvement after 5000 and then 10000ish miles. With mine, it has proved to be a bag of mixed spanners over time though, and I now expect <40mpg on a run (which is worse than the 535d) and <30mpg in town!

My latest problem - noticed last week - is excessive engine noise. When idling, for example, it sounds like a tractor inside - something I have never noticed before. It used to be a rumble, now it's more of a clattering.

I'm not doing any miles now until the service next month, so we'll see if that improves anything