Originally Posted By: Padawan
Originally Posted By: edyvw
It is typical european engine. It requires thicker oil. You can try GC 0W30. It meets MB 229.5, it is thick enough, but still less thicker then M1 0W40.
Try it, and see what feels best. Still I would stick with either M1, GC or PU 5W40.
The engine is actually a Mitsubishi unit, and the original smaller displacement version was designed to power one of Mitsubishi's own kei cars.
Since smart is a Daimler brand, Mercedes-Benz has applied its maintenance schedule and oil specifications to the smart, despite the fact that the car does not utilise a MB-designed or manufactured engine. MB calls for the oil to meet the 229.5 spec and to be changed on a 1 year/10,000 mile interval.
I've owned 3 smarts and have used a number of different oils in them, many of which are not on the 229.5 sheet. One thing I've never noted was an appreciable difference in fuel economy or power output when using various viscosities ranging from Mobil 1 0W-20 to Rotella T6 5W-40.
Currently I'm using Rotella T6 year-round along with a Fram Ultra 6607 filter, though I may switch to Delo 400 LE 5W-40 or Rotella T5 10W-30 and a Tough Guard for the next change. I prefer HDEO for this application, and the 1 gallon container is perfect for the smart's 3.7 quart capacity.
Just as an additional FYI, the OEM smart filter changed last year from a Tokyo Roki to a Mann. The Tokyo Roki can still be sourced by the appropriate Mitsubishi or Yamaha part number.
T6 falls well into required specs for European cars.
When it comes to the choice of filters, I try to stay away from FRAMM and their bombastic names and cheap products.
I have more then exhoustive experience with MANN and would stick with them.
