Re: 147 2.0TS - Fully Synthetic Oil
I agree that in theory the fully synthetics should be the automatic choice, but since their inception there has been a steady stream of people who have had less than satisfactory experience of the stuff. Certainly on the US Alfa bulletin boards there were reports of early fully synthetic oils reacting badly with oil seals, and there is evidence the formulations had to be changed to stop this.
Alfa themselves have just changed the TS oil recommendation to a thicker semi synth oil I understand, in an effort to stop the crank failures this engine has been prone to. I have often wondered whether it is something as daft as the oil being too thin for the oil pump to grab hold of that causes the problems. This would tie in with more than a few reports of engines (not all engines, mind) sounding rattlier on start up with fully synth.
I also feel there is a more fundamental, and to some degree irrational mistrust of these hi tech lubricants. They are designed to be good for about 20,000 miles..but who leaves them that long? Just about nobody I would suggest. We still stick to the 6000 mile oil change or thereabouts, which dates back to conventional mineral oil practice. So the advertised benefits are largely wasted on most car owners.
As I have never had a car which has ever had an oil problem in 35 years of car ownership I have to ask..whats is the point of expensive fully synth when the existing stuff does a perfectly good job, and which of you is ever going to know that there is a micron less wear in your engine components after 100,000 miles.
For what its worth I use semi synth and follow the grade recommended in the car handbook. I don't see any need to go further, and the 2.4 seems to have used almost no oil in 22,000 miles..well I mean less than 0.5 litres