Service my motorhome

I bought a brand new motorhome 12 months ago a Rapido 850 on a fiat chassis I want to get the first service done in the next couple of weeks, I rang a fiat dealer for a price who told me the motorhome doesn't need a service until 2 years old or a certain mialage so good news I thought then he went on to tell me it is advisable to get the oil filter and full oil change, the price for this would be £239 which I thought was a bit expensive but I want to keep the motorhome up to date with all services etc
I then rang a local independent garage to me for a price of oil filter and oil change, the price was £90 all in he will stamp my service book and tells me it will be the same job as a fiat garage also using fiat parts and the same oil fiat will use
So my question is obviously I will go to the local garage for the work but am I missing something by doing this should I use the fiat garage

The Fiat part of your van has a different warranty than your habitation side. It's what Fiat advise is what stands, usually a VAT registered local garage can do the work if they stamp it and use the correct parts.

I would very much doubt it needs an oil change

A Mercedes Sprinter I drove had its first oil change at 34000 miles which is recommended by Mercedes. Someone is wiping your eye, but then I wouldn't doubt that.

What does your Van ( fiat ) manual say ,go by that as Fiat wrote it

My Rapido was first reg March 18, I checked with the Fiat garage about getting a service after 12 months, they assured me this wasn't necessary, I'm sure the quote was closer to £300, I decided to leave it for 24 months as stated in the service schedule. Last week I booked it in to a Fiat dealer for its first service, I was surprised that they only charged £200 for the service and checked for the recall for brake pipes ( tucker etc.). While there, they found the fan belt pulley needs to be replaced, I'm now waiting for the part.

I would get the vehicle serviced as recommended in the manufacturer's handbook, being a motorhome it will certainly be the time-based interval, not the distance.

BTW and a bit off-topic, but, when taking delivery of a new motorhome do visit your local main dealer and check when the warranty clock started. I have experience of a new motorhome having over six months of its warranty period elapsed. The period started when the chassis was bought by the builder, not when the vehicle was eventually sold, a call to the local main dealer with proof of first registration and date of purchase got the warranty clock reset to zero.

Have to agree with baguette I change oil, oil filter, fuel filter and reoil the K&N air filter every year.