Ask Honest John

Most recently answered oil questions
My automatic transmission needs a complete reconditioning. The gear box was dismantled at a specialist transmission place and they reported that the fluid was black, burnt, smelly & low. A full exam...
I've just bought a 36,000 mile 2008 Yaris with a new clutch fitted. I have to be almost stopped before I can engage 1st and, when cold, 2nd is difficult and crunches. Is there a known problem with the...
I am about to have an annual service on our Saab 43,000 miles always serviced, we have been offered an engine flush and fuel treatment along with a Saab 6 months warranty for an additional £150. (Annual...
I read that you stated that modern diesels are unsuitable for successive runs from cold, which I fully comprehend, but how does diesel drain into the sump as a consequence?
You may remember I emailed you last week about my colleague's Range Rover Sport 2.7 diesel with a blown turbo at 104,000 miles. Well the turbo has been replaced but the garage has called him to say the...
Having already had engine problems with a Toyota Avensis 2.0 D4D, purchased new in April 2007 (lower engine replaced at 2 years old due to high oil usage - replacement did not resolve problem - plus EGR...
Hi, I own a Mazda 5, 55 registration, about 82,000 miles run. It consumes 4ltrs engine oil almost every 1000 miles now. I checked for leak or smoke in exhaust but can't spot either of these symptoms. I...
What penalty or problems will there be if a car for which it is recommended that synthetic or semi-synthetic oil is used is given 'normal' oil on an oil change?
I contacted you previously when I was first experiencing high engine oil consumption (Longlife) with my Audi A5, purchased new in July 2010. In the last two years I have had regular interchange with the...
Will Ford's three-year warranty be invalidated if my independent mechanic changes the engine oil before the first and between the annual services? I do about 15,000 miles a year and prefer to change the...
 

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