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Matt, Mechanical Engineer
Category: Car
Satisfied Customers: 21599
Experience:  BEng hons Mech engineering, in auto industry 22 years
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What engine oil will give the very best best fuel consumption

Resolved Question:

What engine oil will give the very best best fuel consumption and performance for my 2014 Clio Diesel?
Submitted: 1 year ago.
Category: Car
Expert:  Matt replied 1 year ago.
Hello to get the best mpg then you need to run the thinnest full synthetic oil permissible for your engine specSo I'd recommend a 0W40 oil either Mobil 1 or Fuchs see here also check for:Binding brakes:Check that all the wheels can be turned freely by hand, and free off any sticking calipersIncorrect wheel alignment:Check all the tyres for signs of uneven wear if it has any then get it checked out at a place that does 4 wheel alignment not just front tracking and ensure tyres are pumped up to their recommended maximumInjectors are clean and not dribbling - add a bottle of injector cleaner to the tank
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Customer: replied 1 year ago.
Thanks Matt. I thought that full synthetic oil was the answer, but wonder if the 0W would be a bit too thin for my 1.5 dCi Dynamique Clio. I will speak to the Renault garage when I next have it serviced, as it's still under the 4 year warranty, and see what can be arranged.
Expert:  Matt replied 1 year ago.
Hi 0W40 is what Renault themselves actually recommend for running in cold climates so you will be fine with this
Customer: replied 1 year ago.
Thanks for the update Matt. Your confirmation that Renault recommend the 0W-40W fully synthetic oil for cold climates (I assume it will work just as well if we have a warm summer) is reassuring and I will seek this inclusion on my next Car service. Well done, and thanks for the timely response.
Expert:  Matt replied 1 year ago.
glad to help

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