The oil in my Mercedes-Benz C200CDI is black after just 1500 miles. Does it need changing?

You repeatedly recommend to change the engine oil more frequently, ie every six months. On your website under 'Running in a diesel' you say "Leave factory fill of oil for the first year or 10,000 miles."...

Is our BMW 530 DSE suitable for use as our only car, including short shopping trips?

I am considering going from a two-car family to one car as my wife and I seldom use both cars together. Our mileage has dropped substantially from when the cars were bought and we now only do 6000 miles...

Does my Peugeot 407 really need diesel fuel additive?

In my 2006 Peugeot 407 SW SE, diesel fuel additive should be checked at 70,000 miles and running out can lead to massive bills. Mine required three litres of additive at 65,000 miles at a cost of £75....

I need to replace my Hyundai Terracan with something cheaper to run - would a Skoda Scout be suitable?

I have a Hyundai Terracan 2.9CRDT manual. It has 118,000 miles on the clock, I'm lucky if it is worth £4000. The Terracan does 22-24mpg and I need something with better fuel economy, reasonable ground...

Does the Ford Kuga diesel have an Eolys-treated DPF system?

I am interested in a Ford Kuga Diesel, but have read that it may have an Eolys additive system on it. Going on various friends' bad experiences with this sort of set-up, I absolutely will not buy a diesel...

At what point do short journeys negatively affect diesel particulate filters?

You often talk about the relationship between short journeys from cold in diesel engine cars and the premature failure of diesel particulate filters. In this context what do you class as a short journey?...

Why isn't my Volkswagen Passat's DPF clogging when I use it for just 7000 miles per year?

You keep talking about the problems associated with DPFs. I have a 56-reg Volkswagen Passat TDI 140 and I only do 7000 miles a year. My daily commute is a round trip of 20 miles and I would rarely do anything...

Does my 2010 Honda CR-V 2.2 i-DTEC ES have a DPF?

Does the above vehicle have a diesel particulate filter? No mention was made about this when my wife and I ordered one last month from our local Honda dealer. Neither is there any mention of this in the...

How often should I change my Peugeot 206's oil and air filters?

Please can you tell me how often should I get the oil and oil filter changed on my 2003 Peugeot 206 SW? Should I get the air filter done at the same time?

Can I use home-processed biodiesel in my Skoda Superb?

I have a Skoda Superb 2.0 diesel, 2005-6. Needing to save money, I can buy a biodiesel kit and buy the used filtered oil. I have a spare garage to do it in and am told I can make up to 2500 litres for...