Originally Posted By: dlundblad
In the summer heat at least, I wonder if it would be beneficial to buy PYB HD 30 weight to use as that 6th quart or as a top off oil.
Didnt AZ have some on clearance for $5 per 5 qt jug??
PYB SAE30 used to be available down here, and had become a significant part of my normal purchasing, using it in my BJ42, and J-Car wagon (before I used 25W-70 in it one winter to demonstrate that it wouldn't blow it up). The PYB had up to date "S" specs.
Alas, the only generally SAE30s that are typically available are Delvac 1330, which I tend not to use (would be all over 1630), and various lawnmower oils, which I resorted to with my E30, running a fill of Caltex mower oil (Delo 500 at the time).
Note, that in every case, the 30 was thinner at 100C than the recommended for my vehicle in the manual...but was relying on hths, not KV100.