RichieL

I have drained all the oil from my 2005 Mondeo 115 TDCI.......I have now realised the oil I have is not 5-30 but 5-40 Shell Helix fully synth' oil.....Will my car be ok having this in, also I dont know if it is for petrol or diesel....Or is it ok to a petrol oil in a diesel engine?

LukeDaisley

iTrader: (1)

it will be fine.

RichieL

Phew!! Thanks mate!! It was a neighbour who came out earlier and said 'Hope you got the right oil for that as they must have 5-30 diesel oil' Well I bought this Shell 5-40 petrol oil a few months ago for my Mi-16 205 but then sold the car so it has been sat in my shed since thus me thinking it was fine for my TDCI?!

stephenbatey

iTrader: (1)

Are you sure?

cossiedad

It will run but is thicker than it should be, so it won't lube how it should do. I would buy the proper stuff. Halfords have a deal on Magnatec at mo so is only Ł17.50. And that is a lot cheaper than an engine repair!
cheeRS

RichieL

Oh....This is a bit worrying as she has had a Re-map, EGR blanked, De-catted....So will most probably need the proper stuff? I looked on the back of the Shell oil and it does say it is ok for diesels, but this 5-40 thing is of concern as it is that bit thicker. I suppose I could always try and sell the Shell oil on Ebay as it was over Ł40 when I bought it so may get some interest.....Or maybe put some Wynns oil treatment in as that is meant to drop the larger number?

mechanic28

iTrader: (5)

fords also insist on 5-30 for cvh's i dont think many people but that in a cvh lol

mechanic28

iTrader: (5)

nearly every single car from 2004 onward seems to have 5w-30 now and we put the same oil in petrols as we do diesels

RichieL

Thanks guys

Well I am going to try and see if I can swap this 5-40 for a 5-30.......This is going to prove fun without a receipt.....Will let you know progress later!!