[slyalfa]

I think the oil that is best for the bottom might not be the best for the top?
my 3l V6 liked the 0-40 moble1 the best. but after I redid it the top would knock with the S cams (the oil jets might have somthing to do with it too) so I went to the 15W50 moble 1 and it seems to like that a lot.

I am runing the 15-40 sync shell truck oil but it seem to not like that so much as it started to burn oil so I will be going back to the moble 15w50.

but the way I see it is, if you have a working gage(rare in a alfa) you should run as thin as you can and keep the oil PSI. if you go to thick the flow will be down and all the oil will be going in to the bypass valve. runing 20W50 dino I runed the bottom of my old v6 it was still runing but knocking at idle. On tear down the the shells where wiped out. this is what happens with too thick and cold runing. it is the same as runing with no oil.

you want flow in the bearings not the bypass. but you also need it keep up the PSI when HOT.
the syn seems to work welll with this. but the dyno would peg at cold and run low hot.

I drive my car every day to work and I put on the miles. so I need it to work and run when cold or when hot.


that is my $0.02