Ask Honest John

Most recently answered modifications questions
You recently published a letter where an insurance company had treated the fitting of cold weather tyres as modification that they should have been told of. Where I live we are plagued by a hoody boy racer...
I've seen adverts for companies that can disconnect the diesel particulate filter from the car's ECU. Is this legal and does it make the car better? I think you said only in the last couple of years DPF...
Can you give me a view as to what I should pay for an ex-demo Alfa Guilietta 140JTDM diesel Veloce, 61 reg with the following spec and around 4000 miles? It has special paint (£490), double electric sunroof...
I have a Volvo XC90 D5, Model Year 2010 (PS185), which is just 2 years old and about to have a service. I'm really pleased with it, but one drawback is that it's a heavy car and feels a bit underpowered...
I am just about to come into my final year before my GCSEs, after which I will be entering VI Form and hopefully be learning how to drive as I am September-born. I live about 25 miles away from the school...
I'm thinking of fitting a K&N air filter to my Toyota Auris 1.6 petrol manual 2008. Would it improve performance, affect fuel economy, or affect my insurance?
Yesterday in Lincoln I saw a 54 plate car wearing Bentley wheel inserts and a Bentley motif on it's rear number plate but with just a letter B on it's boot (could not see the front before it moved off)....
I have fitted running boards, do I need to inform my insurance company?
I recently bought a mesh infill for the grille on my S Type Jag; all above board - reputable specialist supplier etc. I thought I should tell my insurer of the 'modification' rather than have it come back...
You advised a reader that his BMW wheels were 'oversized' as original equipment and that he would be OK fitting smaller ones. My question is whether fitting the smaller wheels/tyres would count as a modification...
 

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