Ask Honest John

Most recently answered engines questions
Is it possible to modify a Euro5 engine to comply with Euro6? If so can the compliance be registered so the vehicle can go to clean air zones without penalty
I have just bought a 2019 Skoda Octavia 1.5 petrol and the air filter inlet scoop is missing, is it important?
I am looking for a Rover 75 and can't seem to find out which were built by BMW and which engine is a BMW engine. There is a 1.8 petrol, 2.0lt diesel and a 2.5 V6 petrol, don't really want a diesel so it's...
I've just purchased a 72-plate Kia Picanto GT Line S. Do modern cars still have automatic chokes? My immediate area has 30mph camera controlled restrictions and I can poodle along in 5th but on the level...
I purchased a 2019 model Volkswagen Golf 1.5 TSI earlier this month and it quickly developed an annoying, though mild, rattle when in two cylinder mode. As soon as the engine flips back to running on all...
Is the Jaguar XF R-Sport (2016) a Ford or Jaguar engine?
Is it worth using E10 protectant?
I have just purchased a 2021 Ford Kuga and noted that the engine cover that fits on top of the engine is missing. I have informed the dealership and the salesperson I dealt with states he has been informed...
Could you shed some light on why Honda and Mercedes both produce such different outputs from their 2-litre four-cylinder turbo engines? The new Type R produces just under 330hp whilst the A45 produces...
I've heard a lot of comments about the 1.5 TSI engine in Volkswagen Group cars and hesitation problems. Other than that it would suit me well, probably in a Skoda Superb. What is the current state of affairs?