0-30 Mobil 1

Is any body using it, Mobil says its safe as a 5-30 replacement and
saves 2% on gas, is it safe on a 02, 4 cil, v40 with 55000m

 

If it were my car I would use the weights recommended in the owners
manual. A 2% improvement in mpg in the real world would be impossible
to prove.

 

2% adds up over time.

The owners manual can't predict new and potentially superior products
that may show up after the car is manufactured. The manual for my 240T
recommends regular 10W30, but few would argue that synthetic is not a
better choice for a car with an oil cooled turbocharger.

 

The Volvo dealer said its fine, 0-30 Mobil One was not made when my
car came out. 2% would be easy for me since where I drive has kept my
avg mpg the same.

 

No problem at all. The engine of your V40 is very modern by any
standards. You can use this very high grade synthetic oil. It will not
only reduce fuel consumption it will also lengthen the expected life of
the engine due to the better lubrification-properties when cold. Go for it.

Joerg

 

Excellent - the dealer is the best place to get a question like that
answered.