Ask Honest John

Most recently answered engine oil questions
Does my Toyota garage use premium oil for my hybrid car? Or best to turn to my local garage?
I changed the oil in my car, ran an engine flush, drained it and then put in new oil. However, now the oil has that awful emulsification - how did this happen? There was absolutely no emulsification in...
My Peugeot 2008 1.2 Puretech had an MoT and oil change a year ago and I have just noticed I was charged £68.47 for oil ! This seems an extraordinary amount, no quantity was listed. Can you tell me what...
I am thinking of buying a Honda CR-V 2018 petrol and keeping it for a long time. As such I would be getting the oil changed every six months or 5000 miles, however I have just been told that Honda engines...
I’ve seen a 2018 Honda CR-V for sale for £21,995 and after making a few inquiries l read that some models had engine oil leaks. Is this something you are aware of? Also do you think this is a good buy?...
I have a two year old Citroen Relay van (2.0 diesel). It had an oil and air filter change a year ago at 4000 miles. It's now done another 4000 miles and a change oil warning light comes on at the start...
What engine oil should I use in my 2012 Audi Q5 3.0 TDI?
My car maker advises fully synthetic 5W/30 engine oil. Are all oil brands of 5W/30 equal?
I have just found oil in my radiator and expansion tank. Any thoughts/suggestions as to what this could be?
Can there really be any difference in engine oils with specification 5W/30 and that meet ACEA C3 for diesel cars? I see that several oil manufacturers produce engine oils for specific cars, eg. VW cars,...