Why I don't rate Selenia oil.
Here are 2 pictures of twinspark engines. One of which has covered 72000 miles on Selenia 20k. The other has done 114k and has been run on Magnatec, Mobil Super S, and Shell Helix during its life.
The First one is the one that has been run on Selenia. The inside of the cam cover was coated in an Anthracite coloured varnish like deposit (see exhaust cam far right cap). The other is my latest 156 and looks pretty much spotless in comparison.
My last 156 was also run on Selenia, and the inside of the cam cover was even worse than the one pictured, and the grooves inside the cam bearing caps were full of a carbon type deposit.
My therory is that Selenia contains a higher number of Viscosity modifiers (These break down in use) It needs more Viscosity modifiers to make it last 12,000 miles. VI modifiers create deposits.
Giulietta 2.0JTDm (170)
Last edited by symon; 06-05-11 at 19:07.