Quote Originally Posted by absolutR View Post
shell helix ultra and shell helix extra.


the two full synthetic oils i use is either agip 0w-30 or the same in motul, which both last longer, and my pcv valve is fairly new.. atm i'm using 5w-40 motul purely coz i ran out of my own little stash of agip. but both motul and agip in the same ratings as what shell i have used will alwasy last longer, and its a shared experience with alot of my mates, we're very picky about what goes into our sumps
That is odd, wonder why. To burn, it has to get into the combustion chamber. When inside the combustion chamber, all oils will burn as the combustion temperature is above the oil's ignition point.