In haste, I accidentally bought Shell 15w40 (Diesel) oil and stuck just under a litre in my car yesterday (A stupid thing to do I know but they bottles are almost identical - apart from one little word). I haven't noticed any problems so far and have been doing a lot of miles, both city and motorway driving. Is it so bad? I mean it's just oil after all. If it is bad then should I try and dilute it with normal oil?
Thanks
Lloyd
Thanks
Lloyd