Originally Posted By: HangFire
If you are looking to curtail oil consumption, you should be looking at the various High Mileage oil options instead of going up in grade.
Of course you can always do both.
I am not looking to curtail consumption. My last fill (which I am ashamed to admit I ran out to 7000 miles) was with Mobil SUper HM blend 5w20. No problems starting all winter and it cured a tiny little oil weep that I had. It has been in since late october 2013.
Over this 7000 mi period I used 1 1/2 quarts of oil, which I refilled with mobil super 5000 (not hm) 5w30. Since I did a fair amount of driving in the snow, and 4wd for fishing the beach last october/november, I do consider this severe duty.
I plan on running this oil for a short cycle (ms5k 5w20) and changing to something for 5k changes or so in the syn blend - perhaps HM - 5w30 on the thin side.
I am under the impression that the mobil super HM syn blend is a "thick" oil compared to it's competitors... I have no complaints about the product, but I don't think I would do full syn HM oil on a long OCI unless I was to use a different filter than the MC FL820-s that I prefer, and I don't trust other filters on this engine from what I have read here and elsewhere.
JC
JC