Originally Posted by 79letour
No. Its bad to put in 6+ quarts.
I've been reading threads on the Scion FR-S forum/site and those guys are having all kinds of qc problems.
But MANY of the fr-s/brz crowd ARE running 5w30 full synthetic and having good results.
I think the 20wt is just too thin. For stone cars it is ok, i just don't think these motors are built to tight enough tolerances to actually spec the 20wt. The end difference between 20 and 30 isn't much, 40 is a huge step however