They did that to my 182 back in March. My service book said it should be 5w40, Renault customer service said it should be 5w40 but the dealer said it should be 10w40. They then produced a service sheet thing which said 10w40 and that is what they were going to go by. I may not have bothered with changing it but they missed stuff off the service and overcharged me so i got them to change it as i was fed up. Got £50 off the bill and a full tank of petrol too.
it'll just take a wee bitty longer to warm up from cold.
Need to gentle for a bit longer. Thays if you leave it to warm up for u caine its ass
I use 10w40.
Never had any issues in 30k miles - starts well and warms up fairly quick too.
Experience