No, you're right, 35mpg on my display equates to probably nearer 34.5MPG in real terms.
I have no idea what you're on about, otherwise. If you can't crack 30mpg on a run at 60-70mph then something isn't quite right with your car. I'm not sure how you can not see this. I've even proven above that 35mpg isn't particularly difficult, and it still only dropped down to 32 after a couple of miles of town driving!
To me, 'on a run' means driving to a motorway, doing a comparatively long distance on said motorway, leaving the motorway, driving a handful of miles through a more urban setting and then arriving at your destination. Obviously if you do half an half motorway / town, then it'll be less, but that's pretty much what my daily commute is, and I still average 26-27mpg doing that.
The centre caps were about £60, and I'll probably recoup some of that back by selling my old ones. Yes, my jacking points occasionally come loose. They seem to bend over time, so I heat them up with a heat gun and bend them back. Solves the problem for a while.
