Ask Honest John

Most recently answered maintenance and servicing questions
I am pondering if the gearbox oil should be changed on my 2005 Skoda Octavia 1.9 TDI five-speed. I has done 150,000 miles. Over the last four months the shift between gears is becoming a bit notchy. The...
In a recent response you specifically said not to use a flushing oil before an engine oil and filter change but gave no reason for this advice. Could you please advise why it is not a good idea to use...
My 2015 Honda CR-V has the option for variable servicing but Honda and its dealers routinely turn this off and apply the 12 month or 12,500 miles regime. Why?
I own a 2010 Volkswagen Polo. It only has 14,000 miles on the clock, when should I change the cam belt?
The battery on my 2007 BMW 325i is no longer holding a charge properly. With previous cars I've changed the battery myself. However having looked at various forums it seems the car may need re-programming...
My Vauxhall Zafira 1.7 diesel (13 reg) used to do about 45 miles to the gallon around town but after my last service it does only 38 miles to the gallon. Can you tell me why this has happened?
My DPF will not regenerate. I have tried forced regeneration in the garage, but it still won't budge. Should I replace with dealer parts which are very expensive. I could replace with a cheaper version...
The first three annual services were carried out by M-B dealers. The M-B dealers want £520 for the fourth annual service. The local independent specialist could be cheaper but still out of the loop. Much...
My MINI 11 plate with 15,552 miles had its service and mot at MINI Salisbury yesterday. I was advised when I paid the MOT bill that my TLC package had run our and I duly renewed it on the spot for another...
My 2007 Picasso has done 120,000 miles. Every couple of months there is a problem with the oil. The mechanic says that due to the injectors possibly being faulty the oil container gets blocked and he needs...