This is sort of one of those 'which oil' questions. When I had my car serviced (mondeo) at the Ford main dealer the service sheet came back as having had the oil changed with Shell Helix. It's now due an oil change so I went to Fords RapidFit situated at the same place as the Ford main dealer to get a quote. Bearing in mind the cost for me to buy some Shell Helix as used at the main dealers would be in excess of £40 I was surprised when RapidFit quoted me £30 including filter. When I questioned them as to whether it would be Shell Helix oil they replied that it was standard oil to Ford specification 'don't worry it's the proper stuff'.
So should I be using the Shell Helix as recommended by the handbook and main dealer, or is the standard ' Ford spec ' ok.
And why would the main dealer use Helix yet the RapidFit centre within the same premises as the main dealer and part of Ford use a totally different oil?
The cars being used as a taxi covering a lot of miles so I suppose correct type of oil is VERY important.