Originally Posted by dave1251
Originally Posted by OilUzer
Did these new "test specification" developed by GM resulted in any significant oil formulation changes (e.g. Lower calcium if that's considered significant, etc.) or nothing major ... did the tests expose any significant oil weakness resulting in better oil for gdi? Any proof or long term test data comparing new and improved oil (if any) vs. the old (pre d1g2) oil?
%0 hype or %100 hype or somewhere inbetween?
It's nothing more than GM asking blenders to cover thier behind due to poor engineering design.
lol my original thought was GM should spend more time developing test specification for their cars
Our only GDI car (hopefully the last if I can help or if possible based on where technology is going) specifies 5Wx20, 5Wx30 or 10Wx30 and 6750 miles OCI and no mention of using synthetic oil... I don't think convevtional/dino come with d1g2! idk
if this was a major issue they would update the OM or send a letter something like "using d1g2 (or synthetic oil) is recommended ..."
I've talked with a very knowledgeable oil person and seen posts from experts on this site regarding timing cain issues ... A lot of cars still using dino (no d1g2 iirc) ... a lot of people at Blackstone use dino based on their website. Nothing against d1g2. I am using it. I think most 5Wx30 synthetics these days are at least d1g2 anyways ... but I think there is some hype element regarding d1g2 not %100 hype but maybe 70% +/-