- Joined
- Mar 11, 2013
- Messages
- 11,169
- Location
- South Bucks
- Car
- CLS63 SB, ML63, CLK350 'Vert, E350 CGI 'Vert, Triumph Sprint (Bike not Dolly...),
My ML420 diesel has done 980 miles since it's last service six weeks ago, and it says it wants a litre of engine oil. It has now covered 156K miles. At that mileage I'm minded to use 5W40 rather than 5W30 (Mercedes-approved 229.51 SPAsh oil, naturally; there are plenty of suppliers of 5W40 on the list) to see if I can curb this thirst a little. Does anybody think that would be a bad idea?