Ask Honest John

Most recently answered rpm questions
I have a Peugeot 2008 1.6-litre BlueHDI. I'm aware that travelling very short journeys is not good for diesel cars. However, occasionally it is unavoidable to undertake such journeys. Is it beneficial...
I have a 2010 Audi A4 diesel auto. When idle, the rpm jumps erratically. It doesn't do this while driving normally though. What could be causing this?
Having read your columns for many years I notice how you advocate the regular use of higher grade petrol. I have a Skoda Octavia Scout 1.8 TSI and inside the fuel door there is a label that says use 95...
I've just taken my Audi A6 in to have the emissions fix because Audi insisted that the performance, fuel consumption and CO2 emission will not be adversely affected. I instantly noticed driving back home...
We replaced our 2013 Volkswagen Touareg with a brand new 262PS R Line + auto six weeks ago. At 60 - 70mph the gearbox constantly shuttles between gears six, seven and eight. The only way to stop it is...
I've just bought a 2001 Peugeot 206 automatic for a little commuter car. It has only done 28,000 miles from new but I'm concerned about the rpm. When I go onto the motorway (70mph) the rpm is about 4200...
I've just watched your Volkswagen Polo economy driving video. I recently bought a new Vauxhall Astra ST 1.4 150 T (i.e. same sort of small capacity turbo engine) which I run on Shell Nitro for low end...