Ask Honest John

Most recently answered euro4 questions
Are there any petrol cars built between, say, 1990 and 2010, which are Ultra Low Emission Zone (ULEZ) compliant? Can you refer me go any listing of such makes?
Which cars pass the London Ultra Low Emission Zone (ULEZ) restrictions?
Our 2016 Dacia Duster diesel was modified by the Dacia dealer to make it Euro 6 compliant. In your opinion do you think it is possible to upgrade our 2014 Dacia Duster diesel that's Euro 5 to Euro 6.
I've had a Ford Fiesta base van (1.4-litre TDCi) since 2017, but my road tax seems quite hefty? I annually pay around £265 to £270. Am I paying too much?
I have a Honda CR-V (2007 - 2012) 2.0 i-VTEC EX - which, according to Transport for London's website, will attract a daily ULEZ charge. When checking against other websites, the car is listed as exempt....
Which small petrol car will be exempt from the new, extended ULEZ charges coming in October 2021? Looking for a used car and up to £4000.
I know that modern diesels don't take kindly to low mileage usage but wondered whether earlier diesels weren't so intolerant (pre-Euro4). Most of the cars in my price range are diesels due to the Government's...
I have a Citroen Relay. It's Euro4, so it falls foul of the ULEZ in London. If I get it converted to Euro6, will Transport for London revise their assessment of the vehicle and exempt it from the ULEZ...